Complete boxed set of M1 Class of Test weights for use with scales and balances. Constructed from finely turned stainless steel. Set includes: 1 x 1g - Tol:1.0mg 2 x 2g - Tol:1.2mg 1 x 5g - Tol:1.5mg 1 x 10g - Tol:2.0mg 2 x 20g - Tol:2.5mg 1 x 50g - Tol:3.0mg Supplied with tweezers, glove and dust brush, in a wooden box