Brand: www.grandmfgcn.com
Min. Order: 2000 
oil level indicatorsight glasssight gageWeb: www grandmfgcn com    E-mail: grandmfgcn at yahoo com
Sight glass, Sight Gauge, Oil level sight glass, liquid Sight Glass, Oil level indicator, View port, male thread sight window
Material
Body:   Aluminum, Steel and Brass
O-Ring: Viton and NBR
Glass:  Real Glass
Glass Thickness: 2mm to 5 mm
Glass Type: General Glass, Tempered Glass and Borosilicate Glass  
Resist Temperature Range: -30 Cent degrees to 120 Cent degrees.
Size:
M10X1,M12X1.5,M14X1.5,M16X1.5,M20X1.5,M24X1.5,M27X1.5,M42X2, 
G 3/8,G 1/2,G 3/4,G 1    NPT 3/8, NPT 1/2,NPT 3/4,NPT 1
Usage:  Pump Gearboxes, Speed Reducer, Compressor and Power Transmission.
More information, please feel free to contact me: grandmfgcn at yahoo dot com