Description: 【Hydroponic Sponges】: These sponges are specifically designed for soilless cultivation, making them ideal for hydroponic seed starting and greenhouse gardening 【Sponge Material】Hydroponic Sponges for Planting is made of sponge, with small square blocks, lightweight and soft, and strong water absorption 【Soilless Design】small square blocks great for soilless cultivation, easy to use, the seedling grow for better breathing and growth 【Easy to Use】First, before using the sponge, please making the sponge wet with the clean water. then, place the plant in the center of the sponge 【Widelt Used】Hydroponic Sponge is suitable for greenhouse cultivation, vegetable planting base, great for growing plants, such as fruits, beans, vegetables, flowers and so on in shed planting, modern agriculture, etc. Specification: Material: Sponge Size Chart: Small Block Sponge: 2.5cmx2.5cmx2.5cm / 1.0inchx1.0inchx1.0inch Sheet: 25cmx25cm/9.8inchx9.8inch Package Includes: 4 Sheet Hydroponic Sponges