Part#AMI1FU4ALCO AMI1FU4 Sight Glass 1/2" SAE FEMALEX1/2" SAE MALE Liquid Moisture IndicatorALCO 1/2" FLARE X 1/2" SWIVEL MOISTURE LIQUID INDICATOR SIGHT GLASSMOISTURE LIQUID INDICATOR SIGHT GLASS, INLET/OUTLET:1/2" FLARE X 1/2" SWIVELMAX WORKING PRESSURE:500 PSIG, KPA:3450DIMS:1-1/2"H X 1-1/2"W X 4-3/8"LORIGIN:MEXICO, IN MFG BOX.