The Kaw Valley Precision Plan B Bravo Mount is built to withstand the toughest conditions. Each mount is made from 17-4 H900 stainless steel and finished with a black nitride coating. With a 1.375"x24 thread pattern, the KVP mount is designed to convert HUB compatible suppressors to a Plan B mounting system. Features17-4 Stainless Steel MaterialBlack Nitride QPQ FinishOAL: .70"OD: 1.485"Weight: 1.8oz