Ant Feeding Area The lid has four square mesh sections to improve ventilation in the feeding area. The side length of each square mesh is 18 mm. The lid color can also be changed. You can request a change to red, blue, green, or black in a message after purchase. Feeding Area Dimensions: Height: 70 mm Length: 96 mm Width: 135 mm Holes for tubes can be drilled in the following sizes: 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, and 16 mm. If you have any questions about the product before purchase, or if you would like to request a specific number and size of holes in the comments section, we can add an image of the product with the holes drilled as requested.