6 inch Redrock Rockwool PRO Grow Block for Hydroponics | 4 Pack + Twin Canaries Chart

Would've given 5 stars if I recieved one intact. There was a deep indent across the top and the plastic covering was ripped down one side. That plastic covering is there to block light so roots can grow, I had to duct tape it up so I could use it.

I liked this product for its convenience it's easy to use and works great if you know how to use it and it is reasonably priced in just over a month my plants have grown 2' high and are Very healthy So far it has done its job very well (For Best Results maintain a very low humidity level to keep it on a more drying out side/ Higher humidity for a slower drying out period)