Got this 14" mini inline tube from badbackglass today. The inline is 50x5mm and the tube itself is 34x3mm. The joint is 14mm.
This thing rips very nice and the small bubble towards the bottom of the tube catches the splash well. This guy is doing some cool stuff, and I dig the old school style as well.
This is the picture Jim sent me. I will toss up a better shot once I dig up my digital camera.