IMI Defense Polymer 18 Steps Ladder Rail Cover FDE. This product improves weapon control and rail protection by providing an any-slip surface. Easily cut for custom lengths each panel fits one side of a carbine-length rail (18 slots). Specifications for IMI Defense Polymer 18 Steps Ladder Rail Cover: Manufacturer: IMI Defense Fabric/Material: Polymer Weight: 39 g Features of IMI Defense Polymer 18 Steps Ladder Rail Cover Made of high-quality flexiblematerial. Durable - highly resistant (cleaningOils mud weather) Fast assembly/disassembly. Low profile fit. Fits Mil-Spec 1913 Picatinny railprofile Package Contents: IMI Defense Polymer 18 Steps Ladder Rail Cover IMI Defense IMI-ZLRCFDE: Polymer 18 Steps Ladder Rail Cover FDE