The 97334270 sight glass is an OEM part from Ingersoll Rand. This will thread directly into the bottom left of the compressor pump and let the operator confirm the amount of oil on the inside of the crankcase assembly.
If you are in need of oil, you would want to purchase a quart of Ingersoll Rand's All Season Select T30 pump oil.
20100285
20100277
32170979
23474661
38436721
