Grodan Gro Block Improved GR4 - 3' w/ hole (3x3x2.6) (Commercial case - no shrinkwrap) Grow Guide 640 thrust CFM through a

640 thrust CFM through a three-blade stainless prop

For a room or a warehouse

Measures 12

dark line that stays clear season after season

Power Requirements: Designed for 110-volt outlets

Grodan Gro Block Improved GR4 - 3' w/ hole (3x3x2.6) (Commercial case - no shrinkwrap) Grow Guide 640 thrust CFM through aGrodan Gro Block Improved GR4 3' w hole (3x3x2. 6) (Commercial case no shrinkwrap) Introducing the newly improved Grodan Gro Block GR4 a revolutionary solution for modern growers. Our state of the art growing block is designed to deliver an unparalleled horticultural experience by focusing on the core factors that influence plant growth: water distribution and root development. New Density & Hydrophilic Technology: The Grodan Gro Block boasts a newly