These trays follow the standard 1020 size but stand out for being four times thicker than the usual ones. They're built to last, completely without drainage holes, perfect for holding water and ideal for bottom-watering. Their superior thickness guarantees exceptional durability, extending their lifespan far beyond other trays. They're reusable for years on end. Sized at 11"x21", these trays perfectly complement our 50 & 72 plug flat inserts and humidity domes, ensuring seamless compatibility.