These blenders have more slits on the bottom to increase airflow. There is essentially zero resistance. These pair amazingly with low resistance pieces, such as the RBR. Works best with a pillar; size 5-6mm diameter and 15-30mm length

Tall tube
16mm diameter
3mm thick wall
Thick dish
Fully worked joint
Beveled top edge
Maria joint
Premium ground joint
Flame polished etched dish
New Mr. Chow inspired engraving