Linear Guide Rail Set, SBR12 1000mm, 2 PCS 39.4 in/1000 mm SBR12 Guide Rails and 4 PCS SBR12UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router Machines Others it would be this one

it would be this one

Transport wheels for easy relocation

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Linear Guide Rail Set, SBR12 1000mm, 2 PCS 39.4 in/1000 mm SBR12 Guide Rails and 4 PCS SBR12UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router Machines Others it would be this oneProduct Features SBR Linear Guide Rail Set SBR12 1000 mm Linear motion guide rail includes 2 x 39. 4 in 1000 mm length SBR12 guide rails and 4 x SBR12UU slide blocks. Dynamic Load Per Block: 372 N, Static Load Per Block: 549 N. Durable & Long lasting The linear rail is made of carbon steel and aluminum with a chrome plated surface for rust resistance and high durability. Built in 4 aluminum slide blocks and ball bearings for smooth and unobstructed