Tubular Spring Balance, a series of six color-coded tubular spring scales that can be used for both force and mass measurements. Each is calibrated in both Newtons and grams with a beveled top for use on an inclined plane. The scales incorporate a unique zero adjustment with a clear plastic tube, allowing students to see the action of the spring. Complete with chrome-plated hooks and rings. Length of tube : 160 mm, diam. 20 mm.
Set of 6:
Blue : 250g/2.5N
Green : 500g/5N
Brown : 1000g/10N
Red : 2000g/20N
White : 3000g/30N
Beige : 5000g/50N