Neoprene, 70-80 durometer hardness rating, 25 in. Lg, 8.125 in. W, 0.250 in. Thk, ends sq, four mtg @slots grouped in pairs, 1st pair located on left end, 1.500 in. From end, 0.719 in. From top edge, 2nd pair located on right end 3.500 in. From end, 0.719 in. From top edge, 0.500 in. By 0.812 slot dim.