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, filth proof, shock proof, noiseless, no harm shaft, neend't maintenance.2. With superior wear-resistance and practice thoroughly to rotation, swing and linear motion.3. It is simple to finish the assembly by simply urgent in together with your hand.4. Maintenance-free, self-lubricating, no need to refuel.5. Reinforcing fibers, fillers and strong grease are added to the base material, so that the bearings meet the performances of wear-resistance , high load, and lubrication.Notice:1. The real coloration of the thing could also be slightly different from the pictures proven on the web content attributable to many factors resembling brightness of your display screen and light-weight brightness.2. Please allow slight manual dimension deviation for the data. Thank in your understanding.3. 1cm=0.39''.Package Included: 1x Linear Bearing