PACKAGING INFORMATION: This package includes 50 seed starter replacement sponges. The large quantity supports starting multiple hydroponic seeds efficiently and saves time. PREMIUM GROWING MEDIA: These plant root growth sponges feature a loose structure that promotes root development. Made from natural materials, the sponges provide a safe environment for plant growth. SIZE: Each seed starter sponge measures 0.7 inch x 2.0 inch. These replacement sponges are compatible with most standard aeroponic seed pods for convenient use. EASY TO USE: Insert the growing sponge into the air chamber, add seeds and water to the chamber, then place into a hydroponic system and wait for germination. COLOR: As shown. MATERIAL: Peat. PACKAGE CONTENTS: 50 x Grow Sponges. Only the listed items are included; other products are not included. NOTE: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.