This injection molded Maxi Garden Tray Tray is made of 100% reycled popypropylene. Ideally sized for standard greenhouse staging and comfortably holds 3 standard seed trays. Internal capacity of over 3 gallons and 1.5″ deep it can be used in many applications. Sturdy and built to last! 31″L x 16″W x 1.5″H 2.75lbs