Select a Product Part NumberIncludesPortFlow R28-03RGWith Gauge3/8"228 SCFM R28-04RWithout Gauge1/2"233 SCFM R28-06RWithout Gauge3/4"233 SCFM R28-03RWithout Gauge3/8"228 SCFM R28-06RGWith Gauge3/4"233 SCFM R28-04RGWith Gauge1/2"233 SCFM