Thickened 1.0mm high- -free plastic: Compared with other 0.5mm plastic materials, seed tray uses double-layer thick materials, which are reusable, super durable and not easy to crack. No harmful additives.Professional function: Two adjustable windows, which can adjust the internal humidity from 50%-100% to your needs. Transparent seed tray allows you to pay attention to the growth. There is a drain hole at the bottom for better drainage. A convenient handle is specially designed on the cover.The perfect size and height of the seeds at the beginning: each cell is 3.7 x 3.7 x 5.5 cm in size, and 4 packs of 72 batteries are suitable for small seeds. Increase the height of the cover to sufficient space for planting flowers, vegetables, fruits, herbs and other plants.[Applicable to heating pad & lamp] It can be used for a long time at water temperature 48 C. This is a good way to cultivate a beautiful and healthy garden. A good helper to flower and vegetable seeds or fruits, trees and other agricultural cultivation indoors.Unique design: Seed entry tray chassis can be stacked one by one, saving space. Therefore, you can stack the chassis the seeds to save your operating space, whether indoors or outdoors.color:GreenMaterial:plasticPackage Contents:1 x 72 hole tray1 x coverOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.