•Aluminum body with brass core •3000psi maximum inlet pressure •1-1/2'' diameter UL-listed gauge •Complies to CGA standard •Internal relief valve •Piston design regulator •Sintered bronze inlet filter for longer service life •Easy to read flow rate window •Alternative color(green,blue,yellow) •Selection of 0-4 0-8 0-15 0-25 each with 12 flow settings ISO13485 certification