Used with six-pack jumbo plug flats, square plastic pots, biodegradeable pots, and other traditional inserts to create compact, efficient growing systems for bedding plants, pack sales, herbs, seedlings, and vegetable transplants. Medium weight injection-molded polypropylene construction with a wide uniform bottom mesh, reinforced at the sides and ends, and solid side walls. Offers extra strength to support inserts uniformly without sagging in the middle for uniform watering. Compatibility: Use with Pro-Trays, Jumbo Plug Flats, and Mini Square Plastic Pots. Dimensions: 10 1/2" x 20 7/8". Black.