![Amazon.com: 1"NPT Male 304 Stainless Steel Oil Sight Glass Hex Head Sight Plug Liquid Level Gauge Oil Indicator Sight Window for Air Compressor Gearbox Fittings Hydraulic Tank (1pcs 1 NPT Stainless Steel) Amazon.com: 1"NPT Male 304 Stainless Steel Oil Sight Glass Hex Head Sight Plug Liquid Level Gauge Oil Indicator Sight Window for Air Compressor Gearbox Fittings Hydraulic Tank (1pcs 1 NPT Stainless Steel)](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/61GnnaDJDOL.jpg)
Amazon.com: 1"NPT Male 304 Stainless Steel Oil Sight Glass Hex Head Sight Plug Liquid Level Gauge Oil Indicator Sight Window for Air Compressor Gearbox Fittings Hydraulic Tank (1pcs 1 NPT Stainless Steel)
![MEANLIN MEASURE Air Compressor Sight Glass 1" NPT Male Hex Head Aluminum Alloy Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Pump Tank (2pcs) - - Amazon.com MEANLIN MEASURE Air Compressor Sight Glass 1" NPT Male Hex Head Aluminum Alloy Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Pump Tank (2pcs) - - Amazon.com](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/61Yw30DpYFL.jpg)
MEANLIN MEASURE Air Compressor Sight Glass 1" NPT Male Hex Head Aluminum Alloy Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Pump Tank (2pcs) - - Amazon.com
![Compressor Oil Sight Glass 1/2 NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Hydraulic Tank Sight Glass (1/2'' NPT Male) - - Compressor Oil Sight Glass 1/2 NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Hydraulic Tank Sight Glass (1/2'' NPT Male) - -](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/51Ta828Lg4L._AC_UF894,1000_QL80_.jpg)
Compressor Oil Sight Glass 1/2 NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window For Air Compressor Gearbox Hydraulic Tank Sight Glass (1/2'' NPT Male) - -
![1'' NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window Hydraulic Tank Sight Glass For Pump Air Compressor Gearbox (1'' NPT Male) - - Amazon.com 1'' NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window Hydraulic Tank Sight Glass For Pump Air Compressor Gearbox (1'' NPT Male) - - Amazon.com](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/619VQ3ZunQS._AC_UF894,1000_QL80_.jpg)
1'' NPT Male Hex Head Stainless Steel Oil Sight Glass Liquid Level Gauge Oil Indicator Window Hydraulic Tank Sight Glass For Pump Air Compressor Gearbox (1'' NPT Male) - - Amazon.com
![Air Compressor Sight Glass 1inch NPT Male Aluminum Alloy Hex Oil Sight Glass Window Oil Liquid Level Gauge For Air Compressor Gearbox Pump Tank (1'' NPT-2pcs) - - Amazon.com Air Compressor Sight Glass 1inch NPT Male Aluminum Alloy Hex Oil Sight Glass Window Oil Liquid Level Gauge For Air Compressor Gearbox Pump Tank (1'' NPT-2pcs) - - Amazon.com](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/61WZBsxvUsL._AC_UF894,1000_QL80_.jpg)
Air Compressor Sight Glass 1inch NPT Male Aluminum Alloy Hex Oil Sight Glass Window Oil Liquid Level Gauge For Air Compressor Gearbox Pump Tank (1'' NPT-2pcs) - - Amazon.com
![200pcs Of 3/8 Bsp Oil Plugs,oil Drain Plug , For Air Compressor Gearbox Roots Blower Pump Fuel Tank - Pump Accessories - AliExpress 200pcs Of 3/8 Bsp Oil Plugs,oil Drain Plug , For Air Compressor Gearbox Roots Blower Pump Fuel Tank - Pump Accessories - AliExpress](https://ae01.alicdn.com/kf/H0925638234944a21a3839e36f6db7c99p/200Pcs-Of-3-8-BSP-Oil-Plugs-Oil-Drain-Plug-For-Air-Compressor-Gearbox-Roots-Blower.jpg_.webp)
200pcs Of 3/8 Bsp Oil Plugs,oil Drain Plug , For Air Compressor Gearbox Roots Blower Pump Fuel Tank - Pump Accessories - AliExpress
![1/2-14 Thread Stainless Steel Oil Sight Glass,oil Viewports,sight Plugs,liquid Window For Air Compressor Gearbox Roots Pump - Pump Accessories - AliExpress 1/2-14 Thread Stainless Steel Oil Sight Glass,oil Viewports,sight Plugs,liquid Window For Air Compressor Gearbox Roots Pump - Pump Accessories - AliExpress](https://ae01.alicdn.com/kf/Hef84f03608cf4a85bd06b016e9e8d775u/1-2-14-Thread-Stainless-Steel-Oil-Sight-Glass-Oil-Viewports-Sight-Plugs-Liquid-Window-For.jpg_Q90.jpg_.webp)