Features Good Material Due to the use of premium aluminum alloy and silicone material, the length counter wheel accessories are very durable for use. For measuring: the wheel ensures stable working on the length gauge and roller transmitter and allows easy measurement of speed and position. WIDE USAGE Allows application in mounting brackets and counting length of plates, pipes, belts, etc., very convenient. RELIABLE WORK With a sturdy structure and a hole diameter of 6mm, the wheel ensures quieter and smoother rolling for accuracy. Easy to Install The encoder wheel is designed for compact size and light weight, and can be quickly installed in minutes. Specification: Item type: length counter wheel. Package list: 1 x length counting wheel. or 1 x length counting wheel. 1 x hex key Package List 1 x Length Counter Wheel 1 x Hex Wrench