Item Type: Meter Counter Wheel Material: Silicone, Aluminum Alloy Diameter: Approx.50mm / 2.0in, 64mm / 2.5in Hole Diameter: Approx. 6mm / 0.24in Application: Suitable for bracket mounting and length counting of plates, tubes, tapes, etc. Package List 2 x Meter Counter Rolling Wheel 1Easy Measurement: The meter counter wheel ensures stable operation of the length meter and rolling encoder, allowing easy measurement of speed and position. 26mm Hole Diameter: With its robust construction and 6mm(0.24in) hole diameter, the meter counter wheel ensures low noise and smoother rolling accuracy. 3Easy to Install: The encoder synchronous wheel is compact in design and light in weight, and can be quickly installed in minutes. 4Aluminum Alloy and Silicone: The encoder synchronous wheel is made of aluminum and silicone materials with excellent craftsmanship and is very durable. 5Wide Application: The meter counter wheel is guaranteed to be practical for bracket mounting and length counting of plates, tubes, strips, etc.