Grodan Gro Block Improved GR4 - 3' w/ hole (3x3x2.6) (Commercial case - no shrinkwrap) Grow Guide Power Requirements: Designed for 110-volt

Power Requirements: Designed for 110-volt outlets

Each box contains 24 individually overwrapped packs with a relative humidity of 55%

and Hortilux optimized this lamp's arc tube chemistry to take advantage of those differences for better performance over the lamp's life

640 thrust CFM through a three-blade stainless prop

dark line that stays clear season after season

Grodan Gro Block Improved GR4 - 3' w/ hole (3x3x2.6) (Commercial case - no shrinkwrap) Grow Guide Power Requirements: Designed for 110-voltGrodan 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