Wide View Flow Sight - 3/4 In.-14 NPT Hex Dia Flats (In.) - Max Working Pressure (PSI) 130 @ 212 Max Operating Temp 212 Degrees F Sight Length (In.) - Sight Dia (In.) 1 3/4 in Overall Length 4 1/4 in Nylon Ball Indicator Aids in Viewing Under Low Light Level or Dark Liquid Conditions Vertical or Horizontal Fluid Lines Features Brass Body Buna N Seals Female x Female NPT Tempered Borosilicate Sight Window