⭐️ I have opened the item once to check the contents and take photos, but it has not been used. ・Please understand that this item is stored at home and will be shipped with simple packaging before purchasing (*´꒳`*) [Metal Body]: The main body is made of aluminum alloy, which is more resistant to wear and rupture than plastic materials and can be used in high-temperature environments. [Transparent Glass]: The tempered glass is transparent and clear, and the oil level can be easily and accurately read in the middle with the sight glass, which is helpful for judging the condition from the outside, and it has high heat resistance and strong bending strength. [Good Seal]: Male threads with O-rings around them are easy to install and tightly seal oil, corrosion, and oxidation. It can provide good sealing performance. [Wide Range of Applications]: Widely used to check the oil level of pumps in CNC machines, air compressors, hydraulic machines, reducers, and mechanical equipment. [Caution] When replacing the oil level sight glass, stop the air compressor and release the pressure. Please check the thread type and size carefully before ordering. Material: Aluminum, organic glass Thread size: M48x1.5 mm Outer diameter: 55 mm Hex width: 48 mm Total height: 26 mm #ai✨shoppingpage✨