Check the listing for details. REBUILD KIT FOR HOLLEY CARBURETOR MODEL 4412 500 CFM 2 BARREL R4412-1,2,3 R9011. Condition: New. Listed at 42.95 USD. This is a rebuild kit for the Holley 500 cfm 2 barrel model number 4412 carburetor. Fits Holley models R4412 R4412-1 R4412-2 R4412-3 R9011. The needle and seat is Viton tipped and the accelerator pump is the 50cc one.We are now assembling these kits from scratch using new U.S. made parts from Walker. As pictured we have upgraded the bowl screw washers to nylon and the mixture screw orings to v iton. If you prefer the original paper and cork ones instead advise us at check out and we will substitute them. We also offer a performance kit in red or blue in our store. Be sure and check our store for more carburetor and fuel systems service parts. We have been providing tech and working with the modular style carburetors since the early 90's. Holley is a registered trademark of HPI to which we have no affiliation nor are these parts manufactured by them. Returns must be in the original shipping box and received by us undamaged to qualify for a refund. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov As of July 9th USPS has combined all non priority shipping including First Class into 1 service called Ground Advantage. Any listings that state we ship First Class will now be shipping Ground Advantage. Ebay is supposed to be updating this in the shipping section of the listing however to avoid any confusion if our description states First Class there is no more First Class available. They are telling us standard delivery times will stay between 3-5 to most locations as before however we have no control over these changes. Ebay will also be updating expected delivery dates if there are any changes there.