Commercial grade PRO Stone wool grow blocks sourced and manufactured in North America
- Stone wool grow blocks are made in the USA
- RedRock Stonewool grow blocks PRO are priced for commercial agriculture production
- Stone wool has high fiber density makes better use of water and fertilizers while allowing dry back
- Sizes available for any crop
w/ 42/40 Hole - 15x15x13.5cm - 6-Inch x 6-Inch x 5.3-Inch
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