ITEM NAME:10Pcs Plastic 8 Mm Linear Anet Bearing Same As Rj4Jp-01-08 Ball Bearing For R8X8 10Pcs Plastic 8 Mm Linear Anet Bearing Same As Rj4Jp-01-08 Ball Bearing For R8X8 Item Type: Ball Bearings Name: RJ4JP-01-08 linear ball baearings. Corrosion-resistant, dust proof, Shock proof, noiseless, no injury shaft, clean (no lubricant), Neend't maintenance. With superior wear-resistance and Apply very well to rotation, swing and linear motion. colour:gray Material:plastic size:Inside diameter: 8mm Outside diameter: 16mm Length: 25mm Package Contents: 10*R solid plastic bearing