Hydroponic sponges can be used to produce high-quality and high-harvest vegetables, melons or berries. Soilless culture cleaning and piping can save space at the same time. It can be widely used in greenhouse cultivation and vegetable planting bases. It can be used for purposes such as greenhouse cultivation and vegetable planting foundation A soilless seed sponge made of high-quality materials. It can without soil or chemical additives and is safe to use. Specially developed for rapid vegetable planting, with maximum convenience. Material:Polyester sponge colour:White Package Contents: 400 x Hydroponic sponge 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.