Check the listing for details. Diesel Fuel Hydrometer Set, Better MPG, Made in USA, Specific Gravity, Quality. Condition: New. Listed at 119.99 USD. Test Your Diesel Fuel Quality... You may be surprised! The density of your diesel is directly proportional to your fuel mileage, horsepower and overall engine performance... Features: Heavy Duty, Industrial Grade.750 to .900 Specific Gravity Range (Quality Diesel should be approximately .850)Built in Temperature CompensationHigh Quality Fuel resistant rubber partsAll in one design for minimal messQuantity Discounts Available **Please let us know what temperature range is desired (60 or 77) If a temperature base is NOT specified, you will receive 77 degree.** Free shipping to the lower 48 states only. If you have any questions about our products, message us. We have trained technicians waiting to answer your questions! Our hours of operation are Monday thru Thursday 7 AM-5 PM EST. HAND-MADE, PRO-GRADE & USA-MADE Check out our eBay store for other great products!