[OEM Direct Replacement Part] Fit models: 190725, ST270P45EZ10, ST270ED145, ST270EDI-45, ST270ED1-45, RSIH1212GS, IH1214GS [Common Uses] For tonneau cover, truck bed cover, boat engine cover, pickup bed cover. Quick tip: Always confirm your part number and dimensions for a hassle [Key Specs] Extension length (hole to hole): 26.97 inch, Compression length (hole to hole): 15.17 inch, Force: 45 pound 200N(fit lid 36-50lb). Ball socket hole diameter 10mm, gas strut thread diameter 8mm [Effortless & Secure] Get easy opening, strong and stable support, safe and gentle closing [3-minutes Installation] Just pop off old strut with screwdriver; bolt on new one. Done [Package content] 2 x 27in 45lb gas struts, 4 x ball studs, 4 x nuts, 1 x guidebook [Customer First Principle] 18 months replacement support. No more wasting time and money for maintenance The 27-inch, 45-pound gas strut supports lids measuring 36-54 inches wide and weighing 36-50 pounds. It reduces the effort required to open the lid and maintains the lifting force to keep it open, freeing the operator's hands. Primarily used for tonneau cover.