Perfect for Microgreen Production & Sprout Growing Bottom Watering Tray Set Included: - 1 x Tray with Drainage Holes & 1 x Tray without Holes. Tray with holes sits inside the tray without holes 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. 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. Made from 100% recycled plastic. . Microgreens Shallow Seed Tray Flats Set Sprouts Bottom Watering Sets 100% Recycled Plastic