Description The professional spring scales tubular that are suitable for using in the science or math classroom. Practical spring scales can provide accuracy, durability and readability to give you convenience, suitable for student laboratory applications. Excellent working performance, premium materials, can be reused and used for long time. Features -Color:Blue -Material:Plastic, glass, stainless steel -Size:25.00X2.50X2.00cm/9.82X0.98X0.79in - Maximum measurement: 1N, 5N, 10N, 20N, 30N. - The spring scale is professional and practical, made of premium and light weight materials, can be used for long time. - Sturdy spring and hook, very strong and rust resistant, not easy to deform or break, you can use rest assured. - Clear housing design of the hanging tube spring scales allow observation of the extension and retraction of the spring. - Scales are graduated in grams (g) and Newton (N), the scale is clear, can meet your requirements better. - Detailed workmanship and creative appearance ensure the popularity and practicality of the scientific spring scales in anywhere like classroom, laboratory to use. Package list: 1 x Spring Scale(1N) 1 x Spring Scale(5N) 1 x Spring Scale(10N) 1 x Spring Scale(20N) 1 x Spring Scale(30N)