Universal Mast Boot. Made of extremely flexible UV resistant vinyl. Designed to fit a number of sizes of mast and deck collars of the same basic shape. Molded in small steps so top and bottom can be cut at the level that provides a snug fit to the mast and the deck collar. Boot may be installed on stepped mast by cutting one side and glue together with the included adhesive. Secure the top and bottom with stainless steel hose clamps. Complete installation instructions are included with each kit. - Fits masts with circumferences of 23 and larger with corresponding mast collars of up to 37".