1-1/2" DRAW-OFF STEM, PTFE COATED(WHITE TEFLON);USE KNOB # 221311;0.3" SQUARE KNOB MOUNT, 10-24 THREADS FOR END NUT;GROEN;KETTLE SERIES: AE, AH, CAH, CDC, D,; D2, DAH, DCAE, DCEE, DEE, DH,; DL, DT, DTA, EE, EM, FT, GPT,; GT, HH, PT, HFP ;(SOME HFP's CAME WITH TANGENT VALVES)