Silicon rubber ams 3326b; 0.125 in. Thk; 12.000 in. Lg; 4.000 in. W for 3.500 in. Tapering to 1.250 in. W for 3.500 in. On other end; 3 holes 0.250 in. Radius 0.625 in. From wide end 1.000 in. C to c; 1 hole 0.250 in. Radius on narrow end 0.625 in. From side and end