Description: This rolling wheel counter is used for measuring length and various mechanical drives, usually for record of weaving, plastic film, leather, etc. Turnning 3 circles in 1meter, can not counting in reverse,restart counting after zero reset. It is equipped with 2 wheels 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: Metal & Plastic Count range: 0-9999.9m Transmission ratio: 1:3 Maximum speed: 200RPM Count Type: Clockwise Length: Approx. 15.3cm / 6in Package Includes: 1 Piece Length Counter