... -500g calibration weight 2, OIML E1,E2,F1 weight 3,ASTM class0,1,2 weight 4,JF-1 stainless steel weight PREMIUM ... , commercial and educational usePREMIUM LINE 1mg-500g weight set: The whole weight set includes 24pcs weights, 2009 new style aluminum box ... weight available.Welcome to our company:No.8 Construction Road, Choumou,Bieqiao Town,Liyang City,Jiangsu Province,China. 1mg-500g test weights set ...