Item Type: Mechanical Length Meter Product Material: Stainless Steel + Rubber Counting Range: 0-99999 Rotation Ratio: 1:3 Maximum Counting Speed: 200 times/min. Working Environment Temperature: -20~+50. Application: Widely used to calculate the length of textiles, printing, artificial leather, etc. Package List 1 x Mechanical Length Meter 2 x Roller 1The main shaft has an antislip slot to prevent the wheels from slipping while rotating. 2When the record length is 1 metre (or 1 yard), the wheel rotates three times, and the counter number pluses 1. The decimal doesn't support count backwards. 35digit display enables a wide counting range from 0 to 99999, meeting all your recording needs. 4When recording a certain number, you can press the handle and all the numbers are reset to 0, and then start the second stage of counting. 5Allows for wide application in calculating the length of textiles, printing, artificial leather, etc.