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.