37 packs contain elements: B,C,Ai,Si,Ti,V,Cr,M n,Fe,Co,Ni,Cu,Zn,Ge,Y,Nb,Mo,Ag,In,Sn,Sb,Te,I,Pr,Sm,Eu,Gd,Dy,Ho,Yb,Hf,Ta,W,Re,Au,Pb,Bi Iron box packaging, internal pouches,Cushioned and shockproof packaging for safe transportation Suitable for hobbyists to study, research, teaching, display, scientific research, experiment, specimen, collection, gift. Glass sealed, 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. Elements Periodic Table Real, 99.99% Purity, Sealed in Glass Tube, for Gift, Teaching, Display