Specifics and features: Complete Linear Rail Kits: This linear rail set includes 2pcs 1000 mm long SBR16 rail shafts and 4pcs SBR16UU blocks. Sliding blocks are used cooperatively with rails, smooth sliding provided by the inside linear bearing Premier Linear Guiding System: Perfect combination of the main axle bearing rail and aluminum alloy support, which nicely stabilizes the original rail. Industrial-grade standard SBR block, with a high precision linear bearing inside The material of shaft is the Carbon Steel with Chromium coating, quenching and anti-rust treatment; high hardness, more durable. Industrial-grade standard SBR block, Make the sliding smooth, low friction, silent operation .
eBay