The Super Sprouter 78 Cell Stonewool Tray Insert is designed for 1.5 inch round or square stonewool plugs. The tray fits seamlessly inside a standard 10 in. x 20 in. flat. This insert sits elevated from the bottom of the flat for optimal drainage and prevents roots from getting smashed.

Super Sprouter 78 Cell Stonewool Tray Insert Features:

• Contains 78 cells
• Fits 1.5 in. round or square stonewool plugs
• Fits standard 1020 tray
• Dimensions: 20 in. x 9.25 in. x 2 in.