Ameriflame R460-510 Ultra Heavy Duty Single Stage Acetylene Regulator with CGA510 Inlet Easy-To-Read Dual Scale 2.5-Inch Gauges, 30 Red Line and 400 PSI/Kg CGA510 Inlet, Maximum Inlet: 300 PSIG Large Brass T-Handle For Smooth, Accurate Adjustments Stainless Steel Diaphragm Forged Brass Bonnet and Body