Parameter: Extended length: 18.70 Inch, Compressed length: 10.08 Inch. 40 Lb / 125 N per strut, 2 PACK. Package information: 18.70 inch 40 lbs gas prop strut X 2 Leer Camper Shell Gas Shock: C16-20651 C16-33313; If the weight and the pressure of the gas strut do not match, the gas strut may not work properly, please select the appropriate gas strut according to the original part number and pressure value. NOTE: The gas struts can not be compressed by hands before installation Application: Gas shock struts fit for Leer/ARE/Tonneau Camper shell rear window topper door Tonneau Cover lift supports RV Truck Car's window and so on High Performances: Our professional manufacturing facility providing you with superior product quality. 180,000 times -passed TUV fatigue test. Pamagoo choose special low-temperature-resistant materials, Working Temperature : -40℃~60 ℃/-40℉~140℉ Warm Services: We will provide 18-MONTHS support service. Whether you have any questions before or after making a purchase, we are here to provide you with professional help and attentive service. Glad you click PAMAGOO to help Pamagoo Gas Spring Struts: Need to prop open a door, cabinet, barrier, or even a car?Your gas struts are construction grade and do all the heavy lifting so you can focus on the real work.Easy Fit & Removal: Plates fitted to each end of your gas springs can easily be fitted and removed to any surface. Best Uses: leer camper shell struts pamagoo gas struts spring accessories canopy shell window springs lift support gas shock back struts for a.r.e. camper truck captruck cap gas struts truck topper partsFeatures: safe and smooth So, What’re You Waiting For? Let your new gas springs do the heavy lifting for you while you can crack on with the job at hand, unhindered and well-executed, click "Add To Cart" Now!