For storing small parts (especially SMT/SMD components), this heavy-duty Large AideTek Box-All Modular Box is ideal. It has 144 individual clear pop-open covers, so you can keep only the ones you want open - less risk of mixing up parts or having a tragic spill. Each wee compartment measures 0.72" (H) x 0.657" (W) x 0.4"(D) or 18.3mm (H) x 16.7mm (W) x 10.2mm (D), can hold up to about 300 pieces of 1206 size resistors/capacitors.