The G Funk is a two part clamp design that’s designed to allow you to fit a Strapdeck in front of or below your bars in order to strap something like a drybag to it for solid-no-wobble-or-shake carrying goodness. Clamps are 31.8mm to fit either side of your stem on almost all modern bars.
**NOTE THIS IS FOR THE 2 X CLAMPS ONLY, STRAPDECKS ARE AVAILABLE SEPARATELY HERE**
There’s a little bit of extra info on drJ0n’s blog that you may find useful here :
31g for the pair including mounting hardware