Glass down pipes with a drop-in bowl attachment.
Available in different lengths & socket sizes.
Lengths are approximate and can vary 10-15mm either way.
Please refer to the image for measurements.
A: Joint size and sex of downtube
B: Bowl fitting size and sex of downtube
This is where your bowl will attach.
(I.E A female fitting on this meaurment with take a drop in herb bowl with a male joint)
C: Length from bottom of joint to the bottom of the downtube.