In a strong aluminium alloy, with protection against overloading the spring. In a strong aluminium alloy, with protection against overloading the spring. The scale is easily readable, as it consists of alternating red and yellow divisionsForceNo.1NP1022212NP1022225NP10222310NP10222420NP10222530NP10222650NP102227100NP102228 PRECISION DYNAMOMETER