RG-250/RG-500:
1 /8NPT connection,2- 3/4"dia
-Scale for R12.R22. R502
-Scale for R22. R404a.R407c.R134A
-ScaleforR410A
RG-250A/RG-500A:
1 /8NPT connection,2- 3/4"dia
-Scale for R12.R22.R502
RG-500-R134/RG-350-R134:
1 /8NPT connection,2- 3/4"dia
-Scale for R134A