EiscoLabs Newton Force Metre Spring Scale - Max Capacity 30N, 3Kg, Dual Scale Labelled

Eisco Labs - Acrylic Tubular Spring Scale (Dynamometer) 30N/3kg Capacity - Spring Scale, Pull Scale, Force Meter, Force Spring, Spring Scales for Science

EISCO Newton Force Meter Spring Scale - Max Capacity 10N, 1 kg, Dual Scale Labeled.