Grodan® Gro-Smart TM Tray Your Grodan Starter plugs, Mini-Blocks TM and Gro-Blocks TM have finally found a home. This durable Dutch tray has double-sided features. Use the 78-cell side to perfectly fit 1.5" A-OK Starter TM plugs or round Macroplugs TM . Use the mesh side for sheets of A-OK's, Mini-Blocks, or Gro-Blocks. The tray fits in a standard 10" x 20" flat and keeps the Grodan elevated from the bottom of the flat. Easily sanitize as any hard-plastic product; it's even dishwasher safe!