*Complete Linear Rail Kits: This linear rail set includes 59 in / 1500 mm long SBR16 rail shafts and 4 x SBR16UU blocks. Sliding blocks are used cooperatively with rails, smooth sliding provided by the inside linear bearing. *High-Quality Steel Material: CNC parts linear rails are made of carbon steel, linear bearings are made of GCr15 bearing steel with aluminum alloy housing. The chrome plating treatment surface makes it beautiful and anti-rust. *Premier Linear Guiding System: Perfect combination of the main axle bearing rail and aluminum alloy support, stabilizing the original rail nicely. Industrial-grade standard SBR block, with a high precision linear bearing inside. *Easy to Install: Conveniently install the linear rail by aligning the track with the mouth of the slide rail and pushing the slide rail until the slide rail completely falls. It's no need for maintenance. *Wide Application: The linear guide rail is widely used in automation machinery such as DIY CNC routers, lathes, machine tools, bending machines, laser welding machines, etc. Also, applicable for large-scale transmission equipment, including industrial robots, cracker machines. ******************************************************************************************************* *Specifications Type: Linear Actuator Bearing Blocks: 4 PCs SBR16UU Rail Shafts: SBR16, 59 in / 1500 mm Diameter: 0.63 in / 16 mm ******************************************************************************************************* *Pakcage Content 2 x SBR16-1500mm Fully Supported Linear Rail Shafts 4 x SBR16UU Sliding Blocks