【Most used for】12 in 20 lb gas shock strut work for pickup truck Aluminum toolbox, weatherguard toolbox, boat deck, CSPS toolbox ARE Leer camper topper side window, and other custom project such as RV door, cabinet lid, box lid | 【Warm Tips】 Please compare the length of your original gas spring' compression and extension, Interchange Number, type of connector, and lift capability before purchasing | 【Product Parameter】Extended Length: 12.0 inch. Compressed Length: 8.1 inch. Force:10 lb/44 N per shock. End Fiting: 10mm Ball Stud Sockets | 【Interchange Part Number】12175, 1573ET, 1631ET, 510020, 5663BZ, 72102, 8195624, 8320, 839531, 901319, 95805, C1610618, C1615053, C1615060, CS120020, EAA835020U, GP51020, ML1520, ML3520, SE350A20, SL1520, SL15201, SL15205, SL3520, SL35201, SL35205, SX120P20. Easy to install, no special tools required | 【12+1 Month Product Service】 welcome to click "ask seller" beside your order for in-time assistance if any problem occurs