CE Smith 16870 Trailer Cross Member Pad - Edge Cover Style CE Smith's Cross Member Pads are designed to cushion your trailer cross members to protect your boat keel. The edge cover style mounts on the trailing edge of any width cross member or axle.Product Features: 10" L x 1-1/2" W; 3/8" thickness; 4-1/2" hole centers; Black Poly Material; Mounts using two rivets or screws; *Hardware not included*