Features: The wheel surface is made of thickening rubber, which is anti-deformation and anti-slip. Aluminum alloy bracket, strong structure, durable in use. Good rigidity, stable operation, easy to use. Rubber wheel, wear-resisting, good friction. Can be used for rotary encoders to create wheel encoders. Specification: Material: rubber, aluminum alloy Model: EW-014 Circumference: 250mm Hole diameter: 8mm Package List: 1* Encoder Meter Wheel Package List 1The wheel surface is made of thickening rubber, which is anti-deformation and anti-slip. 2Aluminum alloy bracket, strong structure, durable in use. 3Good rigidity, stable operation, easy to use. 4Rubber wheel, wear-resisting, good friction. 5Can be used for rotary encoders to create wheel encoders.