– Dezincification Resistant Brass Alloy – Triple Sealing Stem with 2 FKM O-Rings and Teflon Seal – Blow-Out Proof Stem – +/- 2% Accuracy – Patented Removable Venturi – Positive Shut-off – Two Pressure/Temperature (PT) Ports – Additional Accessory Tap – 100% Leak Tested – 100% Made in Italy – Leakproof Stem – Lifetime Warranty