This mage seedling tray is extra sturdy and has reinforced sides. This makes them easy to move from the house to the greenhouse or garden. These trays also feature deep channel ridges on the bottom for better drainage and stability. They do not have holes in the bottom. Built to last a lifetime. Comes with one tray and has five different colors bright green, blue, magenta, lime green and orange color. Measures 10" W x20" L x 2 3/4" H.