Individual weights available in Troemner UltraClass (equals or exceeds OIML Class E2 tolerances), and ANSI/ASTM Classes 1 and 4.

Fractional weights 500mg to 5mg are made of stainless steel (30mg weights are aluminum); fractional weights 3mg and below are made of aluminum.

UltraClass weights 1g to 20kg are made from Troemner Alloy 8, which is a specially austenitic stainless steel that possesses closely controlled density, extremely low magnetic permeability, good stability and resistance to corrosion and handling damage. This exclusive material has a density of 8.0 at 25ºC (controlled to ±0.1%), is essentially non-magnetic in the annealed condition, and will not transform to magnetic under any combination of temperature and cold work down to –195.5ºC (–320ºF). Class 1 and 4 weights 1g to 1kg are made from Troemner Blended Stainless Steel. Weights 2kg to 50kg are made from Type 316 stainless steel.