I don't know why you would use these on an aircraft.i have seen them crack and leak on hotrods and trucks and start and engine fire.1 unnoticed crack and it will break maybe in air and your done no fuel.i would trust the plastic ones and throw them away every 25 hrs who wants to clean them anyway
Oh, and I never fill up without Mr funnel. I had a clear plastic pre pump filter that stayed completely clean for 2 years due to it. ...spect it, it could have stayed in service it was so clean. M...