This shows you the new larger bladder tubing. It has an OD of 5/16", an ID of 1/4", and 1/32" wall thickness. The material is very soft and inflates easily. The pressure is similar to what is found with the old pen bladders. I wrapped some copper wire around our standard fitting to hold the tubing in place and a simple knot at the back. About as basic as you can get. The black color is said to be more immune to damage from UV light, but I have no proof.

You can see that this tubing can hold lots of fuel. This is 2 ounces and it is no where near capacity.