Cat Frame Drop RailsUse the NRS Cataraft Frame Drop Rails to build your own custom cat frame or to turn your existing raft frame into a cataraft frame. Available in two lengths, the Drop Rails allow you flexibility for using the same frame on different types of boats. These lower side rails have a fixed length but can be attached to any crossbars using our LoPro Frame Fittings. Stocked in two lengths 68" and 88", consider the 88" drop rails if your cat is 16' or more. 8