Brand new and high-quality Material: Plastic Color: As picture shows Size of RJMP-01-08: 8*16*25mm Size of RJMP-01-10: 10*19*29mm Size of RJMP-01-12: 12*22*32mm Features: 1. Corrosion-resistant, dust proof, surprise proof, noiseless, no damage shaft, neend't maintenance. 2. With superior wear-resistance and apply very well to rotation, swing and linear motion. 3. It is easy to finish the assembly by way of easily urgent in together with your hand. 4. Maintenance-free, self-lubricating, no use to refuel. 5. Reinforcing fibers, fillers and strong grease are added to the bottom material, in order that the bearings meet the performances of wear-resistance , excessive load, and lubrication. Notice: 1. The genuine coloration of the thing could also be barely various from the pictures shown at the web content attributable to many points comparable to brightness of your visual display unit and lightweight brightness. 2. Please allow slight handbook dimension deviation for the data. Thank for your understanding. 3. 1cm=0.39''. Package Included: 1x Linear Bearing