Includes: 12 piece snap-on rail covers Materials: Industrial grade polymer Compatibility: M-LOK Weight: 0.2 oz/piece Length: 2 in Color: Black or Flat Dark Earth Warranty: Lifetime 12 piece set of snap-on rail covers for AR-15 M-LOK handguards. Covers snap easily into place over exposed sections of rail for improved grip and comfort. Made from industrial polymer, they are durable and lightweight, both weatherproof and temperature resistant. Each cover is 0.2 ounces in weight and 2 inches in length. Available in Black or Flat Dark Earth.