1、Kit Contents: Linear guide rod shaft kit contains 2 linear motion guide rod shaft, 4 SC8UU sliding bearing block, 4 shaft support, 1 lead screw, 1 nut, 2 vertical bearing, 2 flexible shaft coupling. 2、Low Friction Coefficient: Linear guide rod shaft kit is more durable and less noisy. Low friction coefficient and high trajectory accuracy. 3、304 Stainless Steel: Linear guide rod shaft is made of 304 stainless steel material and the sliding bearing block is made of steel material. 4、High Tensile Strength: Linear guide rod shaft kit is with high tensile strength and robust, resistance to corrosion, rust and acid. 5、Wide Use: Linear motion rod shaft sliding bearing block kit is applicable to industrial automation equipment, stepper motor guide. Such as 3D printer, engraving machine, slider, etc.