s: Revolution counter is a recorder specializing in measuring the length or the various machinery revolving. It is commonly used in measuring and recording cable length range, and turning number or winder, etc. With 5 digitals while the clockwise turn can progressively increase the digit, the counter-clockwise turn decrease it. Specifications: External Material: Metal Model: 75-I Digit Display: 5 Range: 0-99999 Max. Rotate Speed: 350 r/min Rated Voltage:220V Shaft Diameter: 6mm/0.24" Body Size: 8.4x4.9x5.7cm/3.31x1.93x2.24" Total Length: 16.5cm/6.5" Mounted Hole Diameter: 5mm/0.2" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Contents: 1 x Revolution Counter