*500MM SBR16 LINEAR RAIL KITS- This linear rail set includes 2 pieces of 500mm/19.7" long SBR16 rail shafts and 4 SBR16UU blocks. Sliding blocks to be used cooperatively with rails, smooth sliding provided by inside linear bearing. *HIGH-QUALITY STEEL MATERIAL- CNC parts linear rails are made of carbon steel, linear Bearings made of GCr15 bearing steel with aluminum alloy housing. Surface chrome plating treatment beautiful anti-rust, hardness can as high as HRC62, more durable. *PREMIER LINEAR GUIDING SYSTEM- Perfect combination of main axle bearing rail and aluminum alloy support, which nicely stabilizes the original rail. Industrial-grade standard SBR block, with high precision linear bearing inside. *EASY TO INSTALL- Aluminum alloy support rail with pre-drilled holes for ease of mounting. Stainless steel Linear optical axis guide bearings linear movement. Easy to install, no need to maintenance. *WIDE APPLICATION- The linear guide rail is widely used in the automation machinery such as DIY CNC routers,lathes, machine tool, bending machines, laser welding machines, etc. Also applicable for large-scale transmission equipment including industrial robots, cracker machines. ******************************************************************************************************* *Specifications Type: Linear slide rail set Performance: Smooth motion Performance: Low noise Rail Shafts: 2 pieces SBR16 Bearing Blocks: 4 pieces SBR16UU Rail shaft length: 500mm/19.7inch Rail shaft diameter: 16mm/0.63inch ******************************************************************************************************* *Pakcage Content 2 x SBR16-500 mm/19.7" Linear Slide Guide Fully-supported Rails 4 x SBR16UU Bearing Blocks