The Mondi™ Propagation Tray Insert 55-01 is designed to streamline pellet expansion for hassle-free propagation, ensuring convenient and clean pellet expansion thanks to its even spacing and airflow. The insert snugly fits 55 propagation pellets, accommodating peat or coco pellets measuring 1.75 inches (42 millimeters) while maintaining excellent drainage through the large-sized holes. Crafted from thick durable plastic with UV protection, the trays are easy to nest and separate.