Check the listing for details. 2ea Fits Master Lift ML-31-90 / Nitro Prop RV Gas Strut Spring Lift Support Arm. Color: Black Nitrate Coated, Condition: New. Listed at 23.99 USD. BUY here with CONFIDENCE USA SELLER - USA STOCK - RAPID DELIVERY WHY BUY FROM US? · WE have actively Used and Sold gas springs for 20+ Years! · WE strive to ship within 24 hours – no waiting · WE stock HUNDREDS of Gas Springs! · WE can produce Custom Gas Springs to your specifications! · WE stock & sell only the Highest Quality Gas filled Springs/Struts - Nitro-Prop · WE are here to help – offering “hand’s on” knowledge/experience and always happy to answer questions. · WE can help clarify information you may need to ensure you order the CORRECT items. · WE also offer an EXTENSIVE LINE of End Fittings, Mounting Brackets and Ball Studs for our Struts – unlike many sellers 15.00 800x600 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 MORE Gas springs listed in our Store This is a DIRECT replacement Set for Master Lift ML-31-90 TIP: when selecting a replacement unit always compare your old unit in both length and pressure to insure proper fit ALSO be sure what end fittings you need – some Assemblies may use this part # with different end fittings You are buying Nitro-Prop brand Struts Fully extended = 7.5 inches … Fully retracted = 5.5 inches (center to center of the ball socket) … Stroke = 2.25 inch Diameter rod = 8mm / tube = 18mm End thread = M6, Ball size =10mm 90 pound force at rest (full extension) You are bidding / buying (2ea) gas spring / shock / strut Manufactured for Nitro-Prop Strut and Spring (NP750-90- ml8) this unit is totally self-contained, hermetically-sealed, a hydro pneumatic linear actuator containing pressurized nitrogen gas, which provides the output force. We ship to the USA only The shipping and handling is a set cost of $7.90 (postage + partial packing cost) for the first and 5.00 for each additional (multiple items may be shipped USPS or FedEx depending weight and destination) Discount Shipping - We are happy to discount shipping on multiple lots or when purchasing from multiple auctions to provide the buyer the best shipping rates whenever possible. PLEASE ask for an invoice to get combined shipping. FAILURE TO WAIT FOR INVOICE WITH COMBINED SHIPPING WILL RESULT IN LOSS OF COMBINED SHIPPING DISCOUNT- eBay has no option to allow sellers a refund for S&H fees once paid (Shipping charges will not be adjusted after payment has been received.) This unit and comes complete with threaded removable 10mm nylon ball sockets both on the rod and tube ends (if you are in need of mounting brackets or ball studs see our selection listed in the store) Looking for a replacement, upgrade or thinking of adding a gas spring to anything you would like assisted power in opening - closing or to be held open hands free this may be for you. Gas springs offer a unique alternative to conventional mechanical, coil spring or counterbalancing devices. The spring rate for a gas cylinder is far less than for any type of mechanical spring. The advantages of these springs involve the combination of a relatively flat force curve, versatility of controlled forces, extension speed, damping at the end of the stroke along with a very compact design. Each gas spring contains a specific amount of oil, which lubricates the seal, piston and piston rod, as well as acting as a damping medium. The oil within the cylinder, when it is compressed or extended, moves from one side of the piston head to the other, providing a damping effect. Replacement TIP: There are many brands of gas springs / shocks / struts manufactured today with just about as many names Nitrogen gas, gas, struts, springs, shocks, dampers etc. , some have a part number that is as equally confusing to understand with out a reference guide! If you are looking to add or replace any gas shocks (they all get weak, worn, bent or broken and need to be replaced at some time) it is easier than you think, here are the basics 1. Just measure the extended length of your shock (from the center of the socket to the center of the socket) that’s the length (that was easy!) 2. if you do not know the force pressure, and it is not listed on the shock (most times it is encoded in the part number on the shock) you can always do a simple test, IE camper topper lid … use a scale to measure the force needed to open the door! a. Be sure to take the old struts off! b. PLACE the scale at the point the strut connects to the door / lid (at the bracket) c. IF 2 struts are used divide the weight in half. That will get you really close 3. Shocks can come in the same length and force pressure but different in physical size (rod diameter / tube diameter- 6x15 / 8x18 / 10x22 / 14x28 MM etc) I think of the physical size in terms of ratings … standard duty (6x15mm) … heavy duty (8x18) … extra heavy duty (10x22), and when nothing else will do use the maxi 14x22MM 4. Mounting brackets / studs can be permanent or replaceable the most common are the ball and socket style (10mm or 13MM) then the ring / eye style. Many shocks come with threaded ends to allow for interchangeable configurations. If you have the option I like to use the ball and socket whenever adding a shock as it is much more flexible then the ring / eye style. Removal TIP: it is very easy to replace most gas springs / shocks/ struts, the most common connection used is the nylon “ball joint socket” to remove your old unit simply insert a “flat” blade screwdriver under the spring clip (you do not have to remove the clip) using the slot provided in the back of the socket, push the screwdriver down just a bit this causes the spring clip to open and it will release the ball end. The new unit now just “pushes” on and snaps in place, that’s it you’re done! If you do not find the size, length or configuration you are in need of in any of our listings, we will do our best to get it listed right away, please just Contact us as we have most all the gas struts / springs that are / were used by WRV, Alpine Coach, Alpenlite, Marathon, Beaver, Safari, Winnebago, Mini Winne, Keystone, Fleetwood, Southwind, Coachmen, Newmar, Forest River, Dutchmen, Itasca, Trail Wagons , Chinook , Georgie Boy, Thor, Holiday Rambler, Damon, Tiffin, National, CT Coachworks, Alfa, Monaco, Safari, Rexhall, Four winds, Safari, Gulf Stream, Country Coach, R-Vision, Blue Bird, Prevost. And they fit boats, campers, car and truck hood lifts, Rear glass lifts, toppers, toolbox, JO box, JOB box. Tanning beds and more! Happy Bidding! Thank-you for your interest Please see the pictures, and READ the description do not assume you are getting more than I have listed, I sell parts and pieces, some complete sets while other items may just be a single replacement / repair part, items may or may not come with installation instructions, box, or all parts / pieces (if it is not in the pictures it is not included!). If in doubt please ask questions before bidding. Please click the ICON ME next to RV-Trader, this tells a bit about me and the items that will be up for auction. Please be patient for answers to your e-mails, as I do not get to work eBay full time. Please be sure to check out our other auctions, click view sellers other items. Many of our RV items only get listed in our store and yes we are open to offers! Be sure to check out our store items, and sign up for the STORE news letter (just click on the “sign up” button in the top right hand side of this page) as we do mark down items just to see who is watching … you will be surprised as to what those prices will be, but they only stay on sale for a short time so be sure to watch your e-mail for the notifications! Watch for MORE items from RV-Trader to come! 801y2e