– Dezincification Resistant Brass Alloy – Gland Follower and Single O-Ring Stem Design – Stainless Steel Ball and Stem – Blow-Out Proof Stem – 100% Leak Tested – IAPMO Certified - NSF 61 / NSF 372 Certified – Leakproof Stem – Lifetime Warranty – 29 in-HG Vacuum Rating – Wetted Surfaces Contain Less than .25% Lead Content