30 packs contain elements: B,C,Ai,Si,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,Y,Nb,Mo,Ag,In,Sn,Sb,Te,I,Sm,Gd,Er,Ta,W,Au,Pb,Bi Iron box packaging, Cushioned and shockproof packaging for safe transportation Suitable for hobbyists to study, research, teaching, display, scientific research, experiment, specimen, collection, gift. Non-toxic, non-hazardous and safe IMPORTANT NOTE: If the component is broken and does not need to be returned or exchanged, please contact us and we will provide one free replacement. Except for gold, silver and more expensive elements, each kind of item is about 1-5 grams. Elements Periodic Table Real, 99.99% Purity, Sealed in Plastic Bottle, for Gift, Teaching, Display, Collection, 30pcs