Cylinder Dynamometer 5n Newton Dynamometer Tension Gauge Spring Scale Experiment Teaching Instrument 2 Pieces Yellow Clear tube made of strong acrylic The mounting ring is attached to the top. Mass hooks are attached to the bottom. Zero adjustment device is built in. Product use: suitable for general determination of various forces in physics teaching experiments in primary and secondary schools Scope of application: suitable for mechanics experiments in primary and secondary schools Range 5N 1. Due to different lighting and screen settings, the color of the product may be slightly different from the picture. 2. Due to different sizes, please allow slight size differences. Product size: about 18cm in length and 2.1cm in diameter Shipping color: yellow Quantity shipped: 2