TAG - 28/18MM Matrix Bong Downstem : TAG

Most pieces use 18/14. Measure insert length only (tube below frosted joint).

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Size Guide: Joint Size & Length

18/14 = 18mm to bong, 14mm bowl.
18/18 = 18mm to bong, 18mm bowl.
28/18 = 28mm to bong, 18mm bowl.
14/10 = 14mm to bong, 10mm bowl.
  • 18/14
  • 18/18
  • 28/18
  • 14/10

18/14 = 18mm to bong / 14mm bowl (most common).

18/18 = 18mm to bong / 18mm bowl.

28/18 = 28mm to bong / 18mm bowl (XL pieces).

14/10 = 14mm to bong / 10mm bowl (rare, often mistaken for 18/14).

    Rule: (Example 18/14MM)
  • First Number: Size To Fit Bong
  • Second Number: Size to Fit Bowl

18mm bong + 14mm bowl → 18/14 (most common).

18mm bong + 18mm bowl → 18/18.

28mm bong + 18mm bowl → 28/18.

14mm bong + 10mm bowl → 14/10 (rare).

18/14 = 18mm to bong, 14mm bowl.

Measure insert length only (tube under the frosted joint).

Tip should sit about ¼–½ inch above the base.

Angle doesn't matter for downstems

Only for ash catchers/adapters

Most Beakers are 45 Degree

Most Straight Tubes are 55 to 60 Degree

Always measure first!

Still not sure? Contact us.
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