Description: This rolling wheel counter is used for measuring length and various mechanical drives, usually for record of weaving, plastic film, leather, etc. Turnning in , can not counting ,restart counting reset. It is equipped with for stability and accuracy of measurement. 5 digits counter, easy to read. Count range: 0-9999.9m Top counting speed: 200RPM, Transmission ratio: 1/3, the count type is clockwise. Specification: Material: ; Plastic Count range: 0-9999.9m Transmission ratio: 1:3 Maximum speed: 200RPM Size Chart: 102mm/4.02inch Package Includes: 1 Piece Length Counter Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping