PACKAGING INFORMATION: In this package you will receive 50 Seed Replacement Sponges. quantities can meet your quick start many seed requirements and save a lot of time. PREMIUM GROWING MEDIA: plant growth sponge has a loose structure that helps plants grow . Plus, replacement growing sponges are made from natural materials to a safe environment for your plants to grow. Applicable Size: seed initial sponge measures 0.7inch x 2.0inch, air glue replacement sponges are compatible with most standard air glue seed pods for ease of use. EASY TO USE: replacement growth sponges are easy to apply. First, you'll need to place the growing sponge in the air protection . Second, add the seeds and an appropriate amount of water to the air . Then, place in a 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.