Originally these were designed to store small watch parts, jeweller's findings or gems. These glass lidded aluminium containers are just as useful for storing all manner of small bits or parts. The glass top makes the contents identifiable at a glance. Supplied in sets of 12 in an aluminium outer box that keeps the individual cases together, safe and organised. 53mm diameter by 25mm deep. Outer boxes 220 x 170 x 26mm respectively.