To obtain the best accuracy from precision balances, the balances need to be frequently calibrated using precision standard weights. Contech offers Brass & Stainless calibrated weights. Weights are available in cylindrical configuration. High precision metrological standard weights and weight box.Complete range : lmg to 200 g weight box and loose weights upto 20 kg.Stainless steel, Austenite alloy, Brass material.Calibrated by NABL accredited Laboratory, RRSL (Regional Reference Standard Laboratory), NPL (National Physical Laboratory).