Sturdy polypropylene snap-shut divider box with 18 fixed compartments. Overall size for this big, tough box is 11" x 6.5" x 1.75" (27.9 x 16.5 x 4.4 cm). Each compartment is 2" x 1.625" (5.1 x 4.1 cm). Made by DeWitt Plastics.
This is the same box we use for our Standard LED Assortment.