The Stax Pro2 kayak carrier has all the straps, blocks, and tie-downs for two kayaks and features universal hardware for round, square, and factory oval load bars. 12' cam style load straps with buckle protectors and 12' safety tie-downs. Fold-down design for low clearance and maximum fuel savings. Proprietary stacker blocks to protect and stabilize the kayaks. Octagonal aluminum and injection molded nylon construction. Dimensions: 5"L x 5"W x 20"H.