Akro-Mils 33224 Akro-Grid Slotted Divider Plastic Tote Box, 22-3/8 -Inch Length by 17-3/8-Inch Width by 4-Inch Height, Case of 6, 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 30 lbs Dividers allow sub-division of the containers, down to a 1-1/4-Inch square compartment size Accepts up to (11) optional 42224 length dividers and (15) optional 41224 width dividers Made in the USA