Comparison : Item # 7639485, Bottom Mounted Tri-Color Gauge Located in Cap, Y2C, 25 PSI, 0.12 NPT, 2 Dia, Liquid with Bushing, Male x Female Pipe, 04MP-02FP
Item # 7626181, Back Mounted Tri-Color Gauge, Y2, 25 PSI, 0.12 NPT, 2 Dia, Glycerin-Filled with Bushing, Male x Female Pipe, 04MP-02FP
Item # 7627463, Back Mounted Tri-Color Glycerin-Filled Gauge, Y2, 25 PSI, 0.12 NPT, 2 Dia
Item # 7626648, Bottom Mounted 1/8" NPT Tri-Color Gauge Located in Cap, Y2, 0-60 PSI, Tested
Item # 7626647, Bottom Mounted Tri-Color Gauge Located in Cap, Y2C, 25 PSI, 0.12 NPT, 2 Dia, Liquid Fill