... Gas Ball Valve, Square Head Sizes: 3/8", 1/2", 3/4", 1" Model No.: 1021BCSA Approved Brass ... Gas Ball Valve, Square HeadSizes: 3/8", 1/2", 3/4", 1"Features:• Femal x Female - Two ... - PTFE Seats - Square Head• CSA Certified - 1/2 PSI for Indoor Appliance Connections per ANSI Z21.15 & CGA9 ... Threaded ends comply with ANSI B1.20.1http://www.hpmetalwork.com/product/235-2-piece-brass-gas-ball-valve-- ...