Grodan Gro Block Improved GR4 Small 3" w/Hole 3" x 3" x 2.6" Strip- Unwrapped (Case of 48 Sleeves) TerpLoc Cabinet insulation: ½" EPS

Cabinet insulation: ½" EPS

Self-Cooling Technology allowed SunBlaster Lighting engineers to push the lighting output to the desired levels without creating unwanted heat

Holds approximately 2 quarts (one half-gallon) of media

Pack of 100

Grodan Gro Block Improved GR4 Small 3" w/Hole 3" x 3" x 2.6" Strip- Unwrapped (Case of 48 Sleeves) TerpLoc Cabinet insulation: ½" EPSGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with Grodans Advanced Wetting Agent. These leading edge blocks have the optimal fiber structure and physical properties for crop uniformity, more