ScopeCoat Barrel Boot Size Fits Most Heavy Barrel 22s & Centerfire - A Dark Earth. Barrel boots keeps dust dirt etc. out of your barrel. Scope Coat Barrel Boots are available in 2 mm and 3 mm thicknesses. These Muzzle Covers are made from light-weight neoprene material Specifications for Scopecoat Barrel Boot Neoprene Muzzle Covers Size A: Manufacturer: Scopecoat Gun Model: Walther P22 Ruger 10/22 Fabric/Material: Neoprene Features of Scopecoat Barrel Boot Neoprene Muzzle Covers Size A Heavy Barrel .22 cal & Center fire - Length: 11 Diameter: .75 to 1 12 & 20 Gauge - Length: 11 Diameter: 1 to 1.25 Double Barrel 12 & 20 gauge shotguns and Muzzle loaders - Length: 11 Diameter: 2.0 AR15 - Length: 5 Diameter: 0.75 If your rifle has a muzzle brake or compensator please account for the extra width/diameter Package Contents: Scopecoat Barrel Boot Neoprene Muzzle Covers Size A Scopecoat Barrel Boot muzzle cover is constructed of the same Neoprene our Scopecoat's and Slideboot's are. Barrel Boot slips easily over the muzzle to protect it from wear dust moisture and scratching. Barrel Boot also helps top protect the bluing. Fits long guns target ries and shotguns. Features/Specifications: Heavy Barrel .22 cal Center fire - Length: 11 Diameter: .75 to 112 20 Gauge - Length: 11 Diameter: 1 to 1.25 Double Barrel 12 20 gauge shotguns and Muzzle loaders - Length: 11 Diameter: 2.0AR15 - Length: 5 Diameter: 0.75 If your rifle has a muzzle brake or compensator please account for the extra width/diameter