3/4" Npt Male 304 Stainless Steel Oil Sight Glass, 2Pcs 3/4" Npt Stainless Steel Product Details The sight glass plug is a kind of liquid indicator used in hydraulic oil tanks, air compressors, pumps, piping systems, automotive industries, lab equipment, bearing housing and mixers, etc. The sight glass gauge has a good viewport for visual Inspection of water, oil, and gas (WOG). Specification: Material: 304 stainless steel Color: Silver Size: As the picture shows Package includes: 3/4" NPT sight glass How to Use: The actual liquid level position screw oil in the oil tank can be placed on the tank sight glass to see, to judge from the outside to run defenders screw oil meets the operating condition. Warm note: Get your air compressor shut down and pressure relief when change oil level sight glass. Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens. Material: The main body is made of 304 stainless steel, which is not easy to wear and burst compares to plastic material. It can work in a high-temperature environment. Temperature Pressure: Stainless steel oil sight glass gauge can work under pressure 800 PSI (55 bar) and temperature -30-120C(-22-248F). The sight window is qualified to pass strict pressure and temperature tests by our factory. Widely Application: Oil level sight glass used widely to check the oil level of the pump in the air compressor, gearbox?hydraulic oil tank . The actual liquid level position screw oil in the oil tank can be placed on the tank sight glass to see, to judge from the outside to run defenders screw oil meets the operating condition. Thread protetion and durable : Thread of oil level sight glass are 1 Inch NPT. The thickness of the sight glass is 3mm you can easily observe the level of the oil by the glass sight window. Service: Our QC department do 100% quality inspection on the stainless steel sight glass before delivery. We will do 100% refund if the sight plug part is defective. Your valuable suggestions and advice will be greatly appreciated by our team. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.