The 7" Extra Tall Canoe Block Single from Riverside a division of Seattle Sports, is a replacement block that is used in different canoe kits to assist their working. This canoe block features a non-slip base and non-skid surface that can be credited to non-skid laminates used in its design. These foam blocks are enhanced with canoe gunnel cut-outs that complement its easy usage by permitting attachment of canoes. Featuring an extra tall design, these blocks are most suitable for use on roofs exhibiting an extreme curvature in their structure. They can be sold in pairs or in bulk singles. Specifications Block Dimensions 5in H x 3.75in D x 7in W Color Gray Normally Ships in 0 to 2 Business Days Features Benefits Construction It features a rectangular profile with gunnel cut-outs. It is made using foam. Non-Skid laminate They permit easy handling and use. Anti-slipping bottom It ensures a firm grounding. Suitability It can be used on roofs featuring extreme curves. Compatibility It can be used with factory rack or no racks. Guaranteed Workmanship and Performance