Made of high quality copper. The sliding bearing uses carbon steel as the and sintered porous bronze as the interlayer, which is self-lubricating and maintenance-free. High wear resistance and corrosion resistance, no oil, good friction performance. The winding bushing is self-lubricating. It has good friction properties, wear resistance and low noise. Bushings can be used for different purposes, such as positioning, wear and vibration reduction, or to isolate the shaft from special media to increase the life of the shaft. Oil-free bushing sleeve bearing, suitable for universal occasions with medium speed and load. Sleeve bearings are used in industrial equipment. Widely used in textile machinery, printing machinery, hydraulic loaders, fitness equipment, agricultural machinery, etc. Solid friction oil-free bushings can work in a wide temperature range. Suitable for applications with sliding motion. Oil-free sleeve bearings are most suitable for places where self-lubricating properties of materials are required. They can also be used to reduce the bore diameter or replace worn out original wheel bushings. colour: as shown Material: Copper Size: 10x19x29 mm Package Contents: 4 x Bearing Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.