Material: This product is made of ABS and stainless steel shell, durable and practical. Electronic weighing device is a dynamometer specially designed for archery. When you pull the strong knot, it saves the instantaneous maximum value of whole process. Unit adopts international pulling unit. Features: Device of electronic weighing is a dynamometer specially designed for archery. When you pull the strong knot, it records the instantaneous maximum value of the whole process. This product is made of ABS and stainless steel shell, durable and practical. Features: Name: Arch Ladder. Materials: ABS and stainless steel. Color: silver. Unit: kg/g/lb/oz (switch by yourself). Display: screen LCD. Dimensions: approx. 140 x 30 mm. Contents: Notes: Conversion: 1cm=10mm. 1. The color of the item may vary from the color of the photos, depending on your computer's display and brightness settings. Thanks! 2. Since measurements are taken by hand, the sizes indicated may vary by 1-3 cm. 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.