Features:1. Practical to use: There are many small holes in each nursery sponge, which are convenient for the seed to germinate and break out of the shell, and can also reduce the workload in the corresponding ocns.2. High-quality Materials: The seed sponge is made of high-quality sponge, soft, durable and breathable, reusable and waterproof, and can ensure the safety of plants.3. Ideal Size: Use sponges under seeds with planting baskets or seed introduction systems to ensure reliable germination and healthy root development.4. Multiple purposes: Seed sponges are suitable for flower nurseries/vegetable nurseries/centralized nurseries for easy management/easy handling and transportation.5. Widely Used: Seed sponge is suitable for germinating hydroponic plants in DIY boxes and cloning machines. Whether you are using a commercial cloning machine or a dedicated nursery box, this is the right choice for germinating plants. Specifications: Name: Seed SpongeMaterial: Biochar-Cotton Size: 20*20*40mm/0.79*0.79*1.57inUsage: When you are ready to start planting new crops, First, make sure the sponge is thoroughly disinfected (warm water with bleach block is good). Then soak the sponge in warm water for a few minutes. The sponge can be unfolded to reveal a pre-drilled hole at one end. Just slide the seed into the hole of each sponge and place the sponge seeds into the cells of the planting block, you can move on to another healthy and strong seed! A biological sponge is composed of pea puree, a block of synthetic fibers and a flexible polymer. The sponges are also biodegradable.50 pieces of planting sponge, suitable for dome seed system,Easy to use: just immerse yourself in water for a few minutes to enter the planting brick. The biological sponge is made up of peas, synthetic fiber rods, and binding polymers. The sponge also has the function of biodegradation! The sponge uses seed oil extract to create superior seed nutrition. Packing List: Sponge*5