Colour coded spring Balances for both force and mars measurement. Individually calibrated dual scale spring Balances has zero adjustment device with stainless steel suspension loop and load hook :

(a) 1N/100g (Brown)
(b) 2.5N/250g (Blue)
(c) 5N/500g (Green)
(d) 10N/1Kg (Ivory)
(e) 20N/2Kg (Red)
(f) 30N/3Kg (White)