PACKAGING INFORMATION: In this package you receive 50 Seed Replacement Sponges. Large quantities can meet your quick start many hydroponic seed requirements and save a lot of time. PREMIUM GROWING MEDIA: Our plant root growth sponge has a loose structure that helps plants grow . Plus, our replacement growing sponges are made from natural materials to provide a safe environment for your plants to grow. Applicable Size: Our seed initial sponge measures 0.7inch x 2.0inch, Our air glue replacement sponges are compatible with most standard air glue seed pods for ease of use. EASY TO USE: Our replacement growth sponges are easy to apply. First, you'll need to place the growing sponge in the air protection chamber. Second, add the seeds and an appropriate amount of water to the air chamber. Then, place them in a hydroponic system and wait for the seeds to start. Colour: as shown Material: peat Package Contents: 50 * Grow Sponges Only the above package content, other products are not included. Note: Light 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.