Hydroponic Sponge Material:These sponges are made of high quality material, it is safe to use.Great equipment for Soilless cultivation,easy to use. hydroponic pots feature: The sponge can be widely used in greenhouse cultivation, vegetable planting base. Perfect for hydroponic, seed starting, cuttings, plant propagation and so on. seedling sponge use for: greenhouse cultivation, vegetable planting base. Perfect for hydroponic, seed starting, cuttings, plant propagation, indoor garden Hydroponic plants and planting vegetables. Garden cultivation plant Size: 600mm×400mm×30mm vegetable garden Product packaging: 1Board×Seedling Plants Root Fixation Spong