NPT One inch Bulls eye sight glass for process pump

Bulls eye sight glass, Gaskets threaded oil sight glass, oil sight glass, oil sight gauge, Circular oil sight glass, oil sight gage, site glass, oil level indicator, liquid sight glass, oil sight window, view ports, male thread sight glass, visual level sight gauge, visual level sight glass, visual level indicator, domed shaped oil sight glass, oil sight glass plugs, round observation ports, NPT sight glass windows, reservoir oil sight glass, hydraulic tank oil sight glass Body material: aluminum, brass, PC, PPMA and steel Glass: Real glass 2 mm to 5 mm thickness. O Ring: Viton O rings Size: M10 to M42, 1/2 inch to 2 inch Thread Type: NPTF, NPT, UNC, UNF, Metric and BSP (G thread) Operate Temperature: -20 Celsius degree to 120 Celsius degree Operate Pressure: 5-10 Bar or 0.5MPa to 1 MPa. MOQ: 2000 Pcs each size Delivery time: 20 days. Payment: T/T Usage: Pump, Thin-wall container, Radiator, Hydraulic reservoir, receivers, Gearboxes, Speed Reducer, Compressor and Power Transmission. Different company have different requirements, OEM Service is welcome.