The all new Control Tower BLK is an updated version of the widely popular original Highly Educated Control Tower, featuring heavier set walls, thicker and larger diameter neck tubing, and a new engraving on the bottom. The Control Tower BLK now comes with a 7mm diameter x 30mm tall pillar instead of 6mm. The thicker walls and pillar increase the heat retention abilities of the Control Tower BLK compared to the original Control Tower.
