Optimize your seed starting and propagation process with our Jumbo Inserts, designed for efficient seedling growth and easy handling. This case includes 100 inserts, each featuring 36 deep cells, totaling 3600 cells for large-scale planting. Crafted from durable polystyrene, these black inserts provide excellent support for root development and prevent overwatering thanks to integrated drain holes. Measuring approximately 2 1/4" x 2 3/8" x 3 1/4" per cell and with overall dimensions of 21" x 11", these inserts seamlessly fit standard 1020 trays or web trays. Ideal for professional growers, nurseries, or enthusiastic gardeners, these inserts simplify transplanting and reduce root disturbance. The robust construction ensures repeated use and reliable performance in greenhouses, grow rooms, or outdoor gardens. These inserts streamline your workflow, enabling efficient transport of cell packs to and from your growing areas. Perfect for a variety of plants, these inserts promote healthy root systems and vigorous plant growth. Maximize your seed starting success with this convenient and practical solution. These inserts are designed to improve aeration and drainage, promoting healthier seedlings. They provide a clean and organized way to start your plants, and are a valuable tool for any gardener.