Features:1. The grease fittings are made of Iron, high hardness, rust-resistance, and oil spill-proof, ensuring a long service time.2. The grease fitting is the oil-filled inlet and is the easiest way to mechanically lubricate. A connection between the grease tube and the mechanical equipment.3. Suitable for most mechanical equipment and industrial applications.4. This grease fitting is a good replacement to replace your old grease fitting.5. The grease fitting is used in a bearing. Convenient for daily maintenance, and replacement operations are simple.Specifications:Thread Size: M8 x 1Material: IronSize: 17*9*18mm / 0.67*0.35*0.71inch (L*W*H)Package Content:2 x Grease Fittings