The LBE Low Profile Gas Block features .750" steel nitride finish and comes with a mid-length gas tube installed for reliable firearm operation.LBE Low Profile Gas Block with Mid-Length Gas Tube.750" Steel Nitride Finished for durability and corrosion resistanceLow Profile Gas Block design for enhanced compatibilityGas tubes made from 304SS Seamless Tubing for superior performanceMid-Length Gas tube pre-installed for convenienceMade in the United States with rigorous quality controlDesigned and manufactured in the USA this gas block assembly delivers the reliability and precision that builders and shooters demand for their long gun builds and modifications.