Sorry but the photo I needed for more input was on a different laptop and I wasn't where it was at the time. Brass reacting with residual oil after a prolonged period sitting in an empty tank does that. I use what's in the picture. It will work up to at least a 115cc engine and probably a lot more. You can't get any more fuel in a carb than what the size of the carb inlet permits and this filter equals or exceeds the size of most carb inlets. Just like fuel tubing, where anything larger than the medium stuff is a waste of money.

This filter has a nasty habit of eliminating bubbles in the fuel line and picking up every last drop of gas before the engine runs dry I use one in the gas can and one in the plane. Don't need no stinking paper filters[8D]