★Must-Read Parameter★ -- Extended Length: 14.96in. Compressed Length: 9.06in; Force: 100 Lb per shock. End fitting: 10mm Ball Stud Mounting Bracket. 【Application】 Our 15-inch 100lb gas struts provide smooth and consistent force to easily lift heavy motorhome beds, RV doors, boat hatches, camper shell lids, tool box covers, cabinets, benches, and more. Perfect for lids and doors weighing 85-115 lbs. ★Where you use them?★ -- Heavy-Duty equipment such as bed with a small compartment, outdoor TV Cabinet, marine projects, heavy toolbox lid, camper shell, truck canopy, trap door, trailer door, trash bin, and other custom Medium or Heavy equipment Medium or Heavy equipment. ★About Installation★ -- Hurotoms 15" 100 pounds gas shocks struts are very easy to install with 2 pillars, 4 mounting brackets and 4 screws. ★Our Commitment★ -- If you have any questions or dissatisfaction or need to install/use guide, welcome to contact us by email or click "Ask the seller".