The extra-strength, propagation trays are perfect for expanding your gardening activities or replacing old trays. Constructed from premium material, these 1020 propagation trays are standard size for the U.S. and Canadian markets. The trays are strong with reinforced sides and lips, making them easy to safely carry around the garden, house, or greenhouse. Their deep-channel bottom ridges provide easy drainage, preventing overwatering and offering better stability for containers.