Brand new and tremendous Material: Plastic Color: As photograph 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, filth proof, shock proof, noiseless, no injury shaft, neend't maintenance. 2. With superior wear-resistance and observe very well to rotation, swing and linear motion. 3. It is straightforward to complete the assembly by way of simply pressing in together with your hand. 4. Maintenance-free, self-lubricating, little need to refuel. 5. Reinforcing fibers, fillers and strong grease are added to the bottom material, so that the bearings meet the performances of wear-resistance , high load, and lubrication. Notice: 1. The genuine coloration of the thing could also be barely diversified from the pictures shown at the web page brought on by many factors such as brightness of your computer screen and lightweight brightness. 2. Please allow slight handbook measurement deviation for the data. Thank for your understanding. 3. 1cm=0.39''. Package Included: 1x Linear Bearing