I could not function in my greenhouse without a bunch of these handy trays. I designed them so I could put 35 to 40 small bags in each. They fit 4 across on the greenhouse benches, and are light enough that I can pick them up without straining. These trays are made of a plastic sheet called Coroplast. It is the same product the bins and tubs the post office uses are made out of. Coroplast comes in a variety of colors and thicknesses. For more on Coroplast, please see the long tray page Front page