Mongolian Basalt columns are mined from the mountains found between Russia and China. Small-volume basaltic volcanism has occurred intermittently throughout central Mongolia for the past 30 million years. Aquascape Mongolian Bosalt is mined, shaped and then drilled to make a stunning semiformal water feature.
These columns have the following dimensions:
Small 7.5" diameter x 12" H
Medium 7.5" diameter x 20" H
Large 10" diameter x 27" H
To Complete your system, here are the individual components:
Ultra 2000 Water Pump
Kink-Free Pip 3/4" x 6' - 98404