This is a premium soilless seed planting sponge. Made of high quality material, it is safe to use. Sprouting without soil or chemical additives. It can sprout multiple types of seeds.Features:Adopts soilless cultivation, which is clean and sanitary meanwhile can save space.Sponge block recesses for easily clip seedlings.Ideal for hydroponics plants and vegetable plants.The hydroponic seedling sponge provides long-lasting moisture to the seed.Soilless cultivation, just water the nutrient solution regularly, without adding soil.Widely used in greenhouse cultivation, modern agriculture, artificial breeding, vegetable planting bases, cultivation of green vegetables and other fields.Specification:Item Type: Hydroponic SpongeMaterial: Polyester SpongeOptional Colors: Black, YellowQuantity: 50pcsSize: Approx. 45*20mm / 1.8*0.8inchWeight: Approx. 40gPackage list:50 x Hydroponic Sponge