Grodan Block DU 4G (Delta) No Hole
These are individually wrapped medium sized rock-wool cubes. Great in DWC systems from seed or clone right through to harvest.
Grodan rock-wool is a vastly superior product with only high quality well constructed rock-wool utilised.
This substrate is also extremely tolerant. Aiding in the growers benefit when transplanting directly into other mediums.
Cube Dimensions: 75x75x65mm