... react with acid and alkali ApplicationsApplied in ornaments, make-up boxes,tools, electronic components,spare parts, little hardwares,chips,small tools ... (inner diameter) Wall thickness(mm) Weight(g) Notice Size1 8 18*12*4.2cm 5.7*4.3*4cm 1.6mm ... 5.3*5.2*5.3cm 1.6mm 333g Size5 18 27*17.8*4.2cm 5.7*4.4*3 ...