Milliard 10 Pack Seedling Tray/Growing Tray/Planting Trays - 21" x 11" No drain holes to retain humidity around your plants to keep them from drying out. Black durable acrylic plastic great for repeated use Quick and easy cleanup Great for use for seed starting, hydroponics or as a drip tray. Pack of 10 trays. Measures 21L x 11W x 3H