Description: 【String Tension Calibrator】Spring tension calibrator for checking machine accuracy. 【Tension Measuring Device】Connect between string machines to see the actual tension. 【Premium Material】The tension calibrator is made of aluminum alloy, which is strong and durable. 【High Performance】Badminton racket tension calibrator are stable performance, vibration resistance, and high practicability. 【Application】Applicable to all brand stringing machines, suitable for tennis/ badminton/ squash/ racquet. Specification: Material: aluminum alloy Size Chart: length: 13.5cm/5.31inch Package Includes: 1 Tension Calibrator Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store