solid block of rubber that measures 3″ X 8 1/2″ X 1″ with 3 quantity 7/8″ holes drilled through it. ONE block even though 2 are shown in the picture. Orignal application was mounting a hydraulic tank on a Military Truck HEMTT but this could be used in any application. Osk Kosh PN# 2246140 or 2BG918 NSN 2590-01-155-2398 Save here on a handy item hard to find 10234 R2A8