Rubber, type 5, class rn or rs, grade a1f2; specification mil-r-3065; 0.090 in. Thk; irregular shaped; first end 28.750 in. Lg; 7 mtg holes 0.200 in. Dia; 4.500 in. Wide; second end 28.750 in. Lg; 7 mtg holes 0.203 in. Dia; 3.250 in. Taper on each side; 2.562 in. Wide; 26.750 in. C to c of mtg hole at ends