DescriptionIf you want to grow the vegetable, and flower varieties that you want togrow, this product is suitable for your green. The sponge is agood seed starter. Even though you don't have the professionalknowledge, you still can use them easily.Features-Color:White-Material:Sponge-Size:30.00X20.00X2.40cm/11.79X7.86X0.94in- Hydroponic Sponge is made of sponge material, these tools are safe to use. Simulated soil constructs an artificial fixing layer. - The sponge block recesses for easily clip seedlings. Sprouting without soil or chemical additives. - Hydroponic Sponge Hydroponic sponge is easy to clean, the roots grow through the mesh fabric for better growth. - Loose holes give plants more room to breathe. Helping to growing plants. Lightweight, easy to carry.- Planting sponge tray kits can be widely used in greenhouse cultivation, vegetable planting base.