The 1.5” size fits perfectly in the Gro-Smart tray as well as all the pre-drilled Gro-Blocks.
One advantage of using the Gro-Smart tray is that it elevates the plugs above the waterline and ensures good airflow around the plugs.
A-Ok plugs come labeled with instructions in a shrink-wrapped package that fits a standard 10 x 20 tray (flat).

Detailed description:

- A-OK PLUGS /MACROPLUGS : AO 36/40 (1.5” plugs)
- Size of Plug : 1.4" sq. x H 1.57"
- Plugs/Package : 98


Package includes:

2940 x Grodan A-OK STARTER PLUGS 1.5'' 36 / 40 98 / SHEET