The plastic tubular Newton spring balances are designed for ease of use and accuracy. Each balance features a color-coded design for quick identification and is scaled in both grams and Newtons, making it suitable for various applications. The visible spring mechanism enhances transparency in operation, while the built-in zero adjustment allows for precise measurements. With a capacity of 250 grams or 2.5 Newtons, these balances are ideal for educational purposes and practical demonstrations in physics.