[Size] - Wheel Size: 32x12mm / 1.26x0.47 Inch(ODxTHK); Thread Size: M8x10mm Thickness: 12mm / 0.47 Inch; Step: 2mm / 0.078 Inch [Material] - The bearing roller is made of POM, and the threaded rod is made of stainless steel [DIY Gadgets] - Slide smoothly…