Sliding rack systems

I like having my trays slide on their lips, like drawers. I prefer this to heavey melamine designs.
These units are constructed with pine, stained and varathaned. I use a variety of different size trays from shoeboxes to blanket boxes for different size animals. The only criteria for the trays, is they must have strong straight lips. Shallow trays are preferred so that more can be put in rack. I generally put wheels on my racks for easy moving.