- The Standard Hub is included in the STARTER LAB KIT and is used as the midway point between an extender/mouthpiece and the downstem of a mason jar bong.
- 1x 3D Printed Standard Hub with Magnetic Tool Holder
- Length: 3.0 in
- Width: 3.0 in
- Height: 1.5 in
*if no color option is selected we will print in black