2 Pieces (SET) Sportsmaster Tonneau Cover Lid Lift Supports REPL C16-21081 Replaces: C16-21081 / 29 Extended Length / 26 lbs. Force / 10mm Ball Sockets--- Extended Length: 28.9 in--Compressed Length:15.91 in Need to replace a lift support? Not sure which one you need? No problem. Contact us by email Amazon@partsavenue.us or call us at (631) 750-1941 Whether you're a professional mechanic or a do-it-yourself guru, we can provide you with detailed installation instructions. LifeTime Limited Warranty On All Our Lift Supports*. See Warranty Details