Perfect for Microgreen Production & Sprout Growing Bottom Watering Tray Set with Propagator Lid Included: - 1 x Tray with Drainage Holes & 1 x Tray without Holes & 1 x Propagator Lid. Tray with holes sits inside the tray without holes. Made from recycled plastic. The internal dimensions of each tray are 34.4cm x 21.2cm x 3.5cm. Microgreens & Sprouts Each tray can be stacked on top of each other to create a bottom feed/watering system with the drainage hole tray stacked on top of the tray without holes with the lid placed on top. This method is an incredibly effective way of growing healthy plants quickly & easily. Add water to the bottom tray, & the plants will take what they need as & when. Microgreens Seed Tray Propagator Lid Set Bottom Watering Trays 100% Recycled Plastic