Includes four casters per caddy Features exclusive non-slip Hydro-Turf center Caddy strap kit and replacement wheels sold separately SPORT CADDY Heavy-duty injection-molded plastic construction Includes three caddies with four plastic dual casters each Each caddy measures 8" L x 7" W x 3" H SEMI-PRO CADDY Tough lightweight natural aluminum construction Includes two caddies that measure 10" L x 7" W x 3" H and one caddy that measures 6.5" L x 6.5" W x 3" H Each caddy features four heavy-duty 2 3/8" casters with extra heavy-duty 2.5" plastic wheels SUPER CADDY STRAP KIT Fits all Sport and Semi-Pro Caddy's Prevents caddy from sliding out from under skis when used on rough surfaces Comes complete with mounting hardware Sold in pairs