Oil level Sight glass, oil level indicator, liquid sight glass, sight window, viewports Body material: aluminum, brass 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: Meter thread, BSP, NPT Operate Temperature: -20 cent degree to 120 cent degree Operate Pressure: 125 PSIG MOQ: 2000 Pecs each size Delivery time: 20 days. Payment: T/T Different company have different requirements, OEM Service is welcome. Any information, please call me or sand me mail: tonyliu1983 at yahoo dot com dot cn.
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