*COMPLETE LINEAR RAIL KITS - The linear rail set will come with 2 pieces of 31.5"/800 mm long SBR16 rail shafts and 4 SBR16UU blocks. The linear bearing inside ensures the smooth sliding of the blocks on the rails. *PREMIUM STEEL MATERIAL - The linear motion slide rails are made of quality steel and aluminum alloy, durable and lightweight. The rugged housing resists rust and wears, offering a long service life. *EFFICIENT LINEAR GUIDING SYSTEM - The linear slide kit is a perfect combination of the main axle rails and blocks. With the smooth sliding of them, the transmission becomes so much easier. *EASE OF INSTALLATION - The linear bearing set has holes pre-drilled for ease of fixation. These several precise kits are easy to install, do the steps one by one carefully, though. *WIDE APPLICATION - The linear guides are widely used in the automation machinery such as DIY CNC routers, lathes, machine tools, bending machines, laser welding machines, etc. ******************************************************************************************************* *Specifications Type: Linear Slide Rail Set Feature: Smooth Motion Performance: Little Noise Condition: Brand New Bearing Blocks: 4 Pieces, SBR16UU Rail Shafts: SBR16, 31.5"/800 mm Gross Weight: 11.0 lbs (5 kg) Package Dimensions: 34.3"x3.9"x3.5" (87x10x9 cm) ******************************************************************************************************* *Pakcage Content 2 x SBR16-800 mm/31.5" Linear Slide Guide Fully-supported Rails 4 x SBR16UU Bearing Blocks