Brand new and excessive qualityMaterial: PlasticColor: As photo showsSize of RJMP-01-08: 8*16*25mmSize of RJMP-01-10: 10*19*29mmSize of RJMP-01-12: 12*22*32mm Features:1. Corrosion-resistant, dirt proof, surprise proof, noiseless, no harm 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 simply urgent in along with your hand.4. Maintenance-free, self-lubricating, no use to refuel.5. Reinforcing fibers, fillers and solid grease are added to the bottom material, so that the bearings meet the performances of wear-resistance , excessive load, and lubrication.Notice:1. The real color of the item may be barely varied from the images proven on the web content caused by many factors such as brightness of your computer screen and light brightness.2. Please enable slight manual measurement deviation for the data. Thank on your understanding.3. 1cm=0.39''.Package Included: 1x Linear Bearing