Brand new and excessive qualityMaterial: PlasticColor: As picture 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, grime proof, shock proof, noiseless, no damage shaft, neend't maintenance.2. With superior wear-resistance and follow thoroughly to rotation, swing and linear motion.3. It is simple to complete the assembly through simply urgent in along with your hand.4. Maintenance-free, self-lubricating, no need to refuel.5. Reinforcing fibers, fillers and stable 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 shade of the item may be barely diversified from the photographs shown at the website caused by many factors resembling brightness of your computer screen and light brightness.2. Please enable slight guide size deviation for the data. Thank in your understanding.3. 1cm=0.39''.Package Included: 1x Linear Bearing