Akro-Mils 33164 Akro-Grid Slotted Divider Plastic Tote Box, 16-1/2 -Inch Length by 10-7/8-Inch Width by 4-Inch Height, Case of 12, Grey Injection molded from polypropylene block copolymer which resists most solvents and chemicals Strong stacking rims and external ribbing provide added strength to hold up to 20 lbs Dividers allow sub-division of the containers, down to a 1-1/4-Inch square compartment size Accepts up to (7) optional 42164 length dividers and (11) optional 41164 width dividers Made in the USA