Forged Carbon steel Hand operated Outside screw & yoke rising spindle/stem, bolted bonnet and positive back seat , Body & Bonnet made of Forged Carbon Steel to ASTM A 105. Seat ring disc and stem of 13% Cr. SS Socket-weld ends to ANSI B 16.11. Body tested to 3000 PSIG and seat to 2200 PSIG hydraulically with IBR and Manufacturers Guarantee Certificate. Sizes ½” to 2”.