Non Skid Laminate, Cut Out Fits Bar Racks. Universal Kayak Kit 18": Blocks 3.75in H X 4.75in D X 17.75in W. Includes: 2 Universal Kayak Non Skid Blocks 2 18* Bow & Stern Cam Buckle Straps 2 9* Block Straps 1 15* Center Strap With Cam Buckle 4 Galvanized Steel S Hooks. Deluxe Kayak Kit 14: Blocks 3in H X 3.75in D X 13.75in W. Includes: 2 Deluxe Kayak Non Skid Blocks 2 18* Bow & Stern Cam Buckle Straps 2 9* Block Straps 1 15* Center Strap With Cam Buckle 4 Galvanized Steel S Hooks. Standard Kayak Kit 12": Blocks 2.75in H X 3.75in D X 12in W. Includes: 2 Standard Kayak Foam Blocks 2 15* Tie Down Ropes 2 9* Block Straps 1 15* Center Strap With Cam Buckle 4 Galvanized Steel S Hookstable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }