The Balance frame is of mild steel, having three point base with a levelling screw. The dual range arc scale 0-250g x 1g division and 0-1 Kg x 10g. With removable 135mm dia x 50mm deep plastic pan. The changeover is effected by a swing over mass on the pointer arm. A hook is provided below the pan for relative density and upthrust determination. Overall dimensions: 250 x 320mm width x height.