SPECIFICATIONS

 -The 72 cell seed starter tray and 1020 seed starting trays are made of high-quality, BPA-free materials, ensuring that your plants are growing in a safe environment and can be washed, sanitized, and reused for years.  Package content: 10 pack seed trays, and 10 pack 1020 trays, all of which are packed in a sturdy cardboard box. 
 -Size: 22"x 11. 4" with NO drain holes, 1. 5mm thickness plant starter tray, strong and durable enough to not buckle under the weight of wet soil for easy moving.  The bottom ridges on the seedling starter tray helps prevent over-watering when the base tray is used alone. 
 -You can reuse these seed cell trays for seed-starting veggies, flowers, herbs, and more.  They are flexible enough to remove individual seedlings to transplant to pots or the garden.  When the seed starter plugs are empty, simply rinse them out, let them fully dry, and plant some more seeds.   
 -72 cell plug trays and plant growing trays are perfectly matched. Each seed cell has a hole at the bottom for drainage, and the plant can absorb water from the base tray through the drain hole, which serves as a water reservoir for consistent seedling growth.  That is ideal, if you are planting microgreens, and want the flexibility of adding fertilizer to the roots without putting anything on the leaves that you can't eat. 
 -The size of the trays is perfect for your greenhouse setup, and they nestle comfortably on shelving taking up little space.  Plus, the ease of stacking and unstacking the trays makes them very user-friendly.  Put the microgreens growing trays under plants to help keep a little water available so you can water them less over winter.  Helps metal shelves from getting wet to prevent rust, damage, mildew, or rot to your wooden or metal shelving.