grodan gro-smart tray insert 78 cells

•78-cell side perfectly fit 1.5 in A-OK Starter Plugs or round Macroplugs.

•Use the mesh side for sheets of A-OK's, Mini-Blocks, or Gro-Blocks

•This durable Dutch tray has double-sided features.

•Ideal for Mini-Blocks and Gro-Blocks

•The tray fits in a standard 10 x 20 flat and keeps the Rockwool elevated from the bottom of the flat