Matheson Dual-Stage Deluxe Brass Regulator, 81H-320, Delivery Pressure 10-125, CGA 320 inlet $405.51 B00BWXMHR8
Matheson Single-Stage High-Purity Stainless Steel Regulator with Tied Diaphragm, 3610A-N/I, Delivery Pressure 4-100 psig, No inlet B00E66KKHM