The professional spring scales tubular that are good for using in the science or math classroom. It offers accuracy, durability and readability to give you convenience. Provides ranges and accuracy that are suitable for student laboratory applications. Excellent working performance, safe materials, can withstand long term using. Features - ColorYellow - Material: Plastic. - Size: 25.50X3.20X2.30cm/10.02X1.26X0.90in. - Maximum measurement: 0.5kg ( ) - This spring scale is professional, adopting reliable and light materials, can withstand . - Sturdy stainless steel spring and hook, very strong and rust resistant, not easy to deform or break. - Clear housing allows observation of the extension and retraction of the spring. - Scales are graduated in grams (g) and Newton (N), the scale is clear, and can better satisfy your demands. - Good workmanship and creative appearance ensure its popularity and practicality in anywhere like classroom, laboratory to use. Package list: 2 x Spring Scales( )