LACASA 1/2" PEX x 1/4"Compression Quater Turn Angle Supply Valve Forged and polished chrome plated body, self lubricating teflon seals Double O ring for safety. Available for copper, iron, CPVC, PEX tube Comply with ASME A112.18.1, CSA B125.1, NSF/ANS161 cUPC and NSF61 approved, conform to NSF372