Features: 1.Accurate Measurement: The spring dynamometer has fatigue resistant spring that ensures accurate measurements even after repeated use. 2.Premium Materials: 5N spring dynamometer, made of premium plastic and iron materials, stable and durable to meet the experimental needs. 3.Easy To Use: This force meter is designed to be simple and suitable for students to operate. Adjustable pointer and scale plate for easy reading of the force. 4.Lightweight And Portable: Compact force gauge with lightweight design, easy to carry and store. Suitable for elementary and middle school mechanics experiments. 5.Multi Application: High performance spring dynamometer, can be used for secondary school students physics and mechanics teaching demonstration, student experiments, etc. specification:Item Type: Spring Dynamometer Material: Plastic, Iron Product : 5N Product Use: Secondary school students physics and mechanics teaching demonstration and student experiments commonly used instruments. Transparent plastic cylinder material (cylinder dynamometer) Scope of Application: Primary and Secondary School Mechanics Experiments PackageList:4 x SpringDynamometer