Package Includes: You get 12 sheets whole hydroponic sponges - 1200 pcs mini planting sponges. You can choose to use these hydroponic planting sponge separately. The size of the separated small hydroponic sponge pieces is 1inch. Wide Range of Applications: Hydroponic sponge blocks are suitable for soilless cultivation, hydroponic systems, aeroponics, etc. Hydroponic sponge blocks are Perfect for indoor growing, making research, observation and recording easy. Seed : Hydroponic sponge Squares provide the Perfect environment for seed germination. Our sponge blocks are pre-drilled for easy insertion of your plants. Sponge blocks have good water retention and ventilation, promoting the growth of healthy seedlings. Premium Water Absorbency: Soak the sponge pieces in water in advance before use to they absorb water completely. Check the condition of your hydroponic sponge regularly. Make adjustments promptly. It saves time and effort to use and is simple to operate. Note: Avoid soaking sponge pieces in water for long periods of time as this can cause a lack of oxygen to the plant . Colour:White Material:sponge Size: 25 x 25 x 2.5cm Package Contents: 1200 x Sponge Squares 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.