Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 721C 500 350 B 721C500350B Welding Shirts Duty) 11210 LF 72 (Bench Model) Package Size:0.045 in, 1000 lb Infinity Pak Duty) 11210 LF 72 (Bench Model) 11075 LF 72 (Bench Model) 11607 LF 72 (Bench) 11076 LF 72 (CE) 11227 LF 72 (HD Bench Model) 11711 LF 72 (HD) 11609 LF 72 CCC 12422 LF 74 (Base Model) 11712 LF 74 (Base Model) CCC 12442 LF 74 (HD Bench Model) 11713 LF 74 (HD Bench Model) CCC 12443 LF 74 (Base Model) 11195 LF 74 (Bench Model) 11196 LF 74 (HD Bench Model) 11197 Installation guidance Adapter used for connecting 7 pin to the new 12 pin connector Brass Barstock body except for models with CGA 300 and 510 that are equipped with a 400 PSIG inlet gauge