Qty (2) Camper Rear Window, Tonneau Cover Lift Supports, Struts. Suspa C16-20877 C1620877 This listing includes 2 Lift Supports For the Rear Glass Window. Extended Length from Center Mount to Center Mount is 22.87 in. Suspa supports are Made in the USA, install easily in minutes, often times without special tools required. Displayed shipping rate apply to the contiguous 48 States only. Additional surcharge applies to PUERTO RICO, HAWAII, ALASKA & OTHER US TERRITORIES.. Interchangable with the following OEM Numbers: C1620877,C16-20877