311-01S stainless steel weights, bottle shape, one piece construction, ANSI/ASTM Class 7 (Also meets OIML Class M2), 5-2-2-1 series. Milligram weights are aluminum and stainless steel. Covered box. Durable inert polypropylene with integral hinge. Milligram weights have individual compartments with clear cover. Forceps included.
341S stainless steel weights for school and industrial use. Weight set is reasonably priced and accurate. Fractional weights are satin finished aluminum and grouped in one compartment. Total capacity is 101 grams. ANSI/ASTM Class 7 (Also meets OIML Class M2).
Mass set with Statement of Accuracy