SPRING BALANCES TUBULAR NEWTON -HLSI
'Used to measure force -such as the force of gravity -exerted on a mass -or be calibrated for the accurate measurement of mass. Newton spring balances. Each range is colour coded for convenience -and is scaled in both grams and Newton''s. The spring mechanism is clearly visible and zero adjustment is incorporated. Length 250mm overall -including ring and hook.'
Metal tube with hook.