This durable, double-sided GRODAN® Gro-Smart Tray is a perfect fit for GRODAN plugs and blocks. The tray’s 78-cell side is ideal for 1.5-inch A-OKs™ and Macroplugs™. This design greatly improves the airflow around cuttings, and the rounded mesh support in the bottom of each cell helps to prevent root damage when pulling the plant up. The mesh side is perfect for Mini-blocks or other GRODAN blocks. This tray fits in a standard flat, where it elevates the growing medium, keeping it from touching the bottom of the flat.