Features: The science spring balance hanging spring scale has tubular spring scales with different measurement ranges for determining weight. Each scale has a ring at the tops for hanging, and an s-hook at the bottom for attaching the sample to be weighed. The clear plastic housing of the scales allows observation of the extension and retraction of the springs. A spring scale, or spring balance, is used in classroom and field applications to measure weight and to explore physics principles of force and mass. Features - Color: Random color - Material: Plastic. - Size: 25.00 x 2.50 x 2.50cm/ 9.82 x 0.98 x 0.98 inch. - This spring scale have a clear plastic body that is calibrated in both grams and newton. - Both rings and hooks are plated and each can be zeroed with the metal nut located at the tops. - Each scale has a ring at the tops for hanging, and an s-hook at the bottom for attaching the sample to be weighed. - Clear plastic housing allows observation of the extension and retraction of the spring. - The dynamometer is used for gravity measurement and tension measurement. Package list: 4 x spring scales