I started seeding my tomatoes, my six cell, hard plastic trays fit in my 1020 trays!! I mixed my tomatoes and peppers up, six to a six pack! Peppers always take longer to sprout so I can take out the tomatoes, and leave the peppers for longer! I can replace the full six pack with an empty six pack, and they don’t slip around in my 1020 trays! I need to order more! Soon Thank You for showy the six packs off!!