Item Type: Linear Motion Rod Shaft Sliding Bearing Block Kit Material: High carbon steel, steel, aluminum alloy, brass Use: Applicable to industrial automation equipment, stepper motor guide. Such as 3D printer, engraving machine, slider, etc.1Kit 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. 2Low Friction Coefficient: Linear guide rod shaft kit is more durable and less noisy. Low friction coefficient and high trajectory accuracy. 3304 Stainless Steel: Linear guide rod shaft is made of 304 stainless steel material and the sliding bearing block is made of steel material. 4High Tensile Strength: Linear guide rod shaft kit is with high tensile strength and robust, resistance to corrosion, rust and acid. 5Wide 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. 2 xLinear MotionGuide Rod Shaft(Diameter 8mm-L Length) 4 x SC8UU Sliding Bearing Block 4 x Shaft Support 1 x T8x8(P2) Length L Lead Screw 1 x Nut 2 x KP08 Vertical Bearing 2 x D19L25(5-8) Flexible Shaft Coupling