These closed cell foam blocks help protect your kayak during transport.This product will be shipped directly from SportRack and will leave their warehouse in 2-3 business days. Eligible for UPS ground shipping only. . Non-skid underside helps protect the vehicle finish. Includes 2 straps to secure foam to vehicle. Includes bow and stern tie downs to ensure kayak is secured to vehicle. Fits SportRack Roof Rack Systems, square, round, most factory racks and bare roofs. Holds 1 kayak. 770527906016 19602100012 SR5525