Perfect Seed Trays - Size: 54 x 28mm and 50 cells per tray. 50 cells on can offer enough space to grow seeds of your favortie plant. The air hole on top can make sure that air flows soomthly and the drain hole at bottom can prevent from overwatering. Thickend Base Trays with NO DRAIN HOLES. Best solution for soil or hydroponic plant in greenhouse. 1.5mm thickness base tray, strong and , they can not be easily broken even if filled with water or soil. Seedling tray and base tray are perfect matched, base tray can hold the excess water from seedling tray. Optimal Solution for Greenhouse & Gardening - With our gardening kit, you can easily plant seedlings in your garden or greenhouse as a foundation for your dream of a beautiful garden filled with all kinds of flowers and green plants. At the same time you can reuse these gardening trays, they are made of and environmentally friendly plastic material. color:Black Material:plastic size: Single hole 54 x 28mm Package Contents: 5 x 50-hole seedling tray Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.