IMI Defense Polymer Key-Mod Rail Cover - Set Of 4 Black. This product improves weapon control and SLOT protection by providing an any-slip surface. Easily cut for custom lengths each panel fits 5 KEY-MOD SLOTS. Specifications for IMI Defense Polymer Key-Mod Rail Cover - Set Of 4: Manufacturer: IMI Defense Fabric/Material: Polymer Weight: 140 g Features of IMI Defense Polymer Key-Mod Rail Cover - Set Of 4 Made of high-quality flexible material Durable highly resistant (cleaning Oils mud weather) Fast assembly/disassembly Low profile fit Fits KEY-MOD SLOTS Set of 4 Key-Mod Rail Covers Package Contents: IMI Defense Polymer Key-Mod Rail Cover - Set Of 4 IMI Defense IMI-ZKRCBLACK: Polymer Key-Mod Rail Cover - Set Of 4 Black