2 x Linear Guide Rail with 4 Slide Block. Linear Guide Rail: Approx. 40x1.5x1.5cm / 15.7x0.6x0.6in. Slider Color: Black. Item Type: Guide Rail. Slide Block: Approx. 6x3.5x2.5cm / 2.4x1.4x1.0in. Made of high hardness cast iron, it is durable, wear-resistant and corrosion-resistant.
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