Harris® Model 301-CD60-320 Medium/Heavy Duty Compact, Lightweight, Rugged Carbon Dioxide Flowgauge Regulator, CGA-320Harris Model 301 CD60 320 carbon dioxide medium to heavy duty flowgauge regulator designed to be compact, lightweight and rugged. Regulator provides accurate pressure regulation that is ideal for small cylinders or confined spaces. Model 301 features a brass body, 2" steel dual scale gauges, one piece encapsulated seat design with internal filter and PTFE Teflon seat and 5 8" 18" (F) outlet connection. This regulator is UL listed and conforms to CGA E