*KeyFeatures *Complete Linear Rail Kits: This linear guide rail set includes 2 pieces of 66.9 in / 1700 mm long HSR20 rail shafts, 4 HSR20 bearing blocks, and a bunch of dust-proof plugs. *High-Quality Steel Material: The linear motion slide rails are made of high-quality 55C steel, and blocks are made of GCr15 ball bearing steel and PA66, an excellent non-conductor. The durable kit will endure through time. *Premier Linear Guiding System: The linear slide guide rail provides a smooth and precise sliding surface for the bearing blocks. It helps to build an economical linear guiding system and is designed to achieve high precision linear motion, low friction coefficient. *Easy to Install: The linear bearing set has holes pre-drilled for ease of fixation. It's easy to install and meet all your needs for many different machines. What's more, it generally does not need to maintain. *Wide Application: The linear guide rail is widely used in CNC Router/CNC Grinding machines, industrial machinery printing, paper-processing, automatic machine, X-Y table, factory automation equipment, etc. ******************************************************************************************************* *Specifications Type: Linear Actuator Rail Shafts: HSR20, 66.9 in / 1700 mm Gross Weight: 20 lbs / 9.1 kg Package Dimensions: 67.3 x 3.5 x 3.1 in / 171 x 9 x 8 cm ******************************************************************************************************* *Pakcage Content 2 x HSR20-1700 mm Linear Slide Guide Rails 4 x HSR20 Bearing Blocks 1 x Set of Dust-Proof Plugs