Oil level Sight glasses, oil sight gauge, oilsight gage, oil level indicator, liquid sight glass, sight window, view ports,male thread sight glasses, domed sight glass plug
Material
Body:   Aluminum, Steel, PMMA, Plastic and Brass
O-Ring: Viton and NBR
Glass:  Natural Glass
Glass Thickness:2mmto5 mm
Glass Type: General Glass, Tempered Glass and Borosilicate Glass 
Resist Temperature Range: -30 Cent degrees to 120 Cent degrees.

PressureRange:  5-10Bar or 0.5MPa to 1 MPa.

Connections: NPTF, NPT, UNC, UNF, Metric and BSP (Gthread)

Size:M10X1, M16X1.5,M20X1.5, ,M27X1.5,M33X1.5,
G 3/8,G 1/2,G 3/4,G 1    NPT 3/8, NPT 1/2,NPT 3/4,NPT 1

MOQ: 2000 Pcs each size

Delivery time: 20 days.

Usage: Pump, Thin-wall container, Radiator, Hydraulic reservoir,receivers, Gearboxes, Speed Reducer, Compressor and PowerTransmission.

Different company have different requirements, OEM Service is welcome.

Any information, please call me or sand me mail: grandmfgcn at yahoo dot com.