Dwyer 17DSFI400SS1/2

Dwyer SFI-400SS-1/2 Sight flow indicator, 1/2" body, 4.500" (114 mm) length, 3.500" (89 mm) flange dia., 1.500" (38 mm) viewing dia., 3.8 lb (1.7 kg). from StaniosIndustrial.com