Valve extenders

[ua40j]

I've used valve stem extenders forever, but they have always been steel or chrome plated brass or some kind of metal.

However, a trip to the Haldec website introduced me to new polymer extenders specifically designed for light weight, high vibration use.

Anyone have any experience with these?

www.haltec.com/webdev/2004Catalog/33.pdf

[FleetMan]

Those are the extenders Winnebago used on our Journey, the 6.53" version. I have not had any problems with them, they do not leak and the "Alligator" cap that comes with them eliminates the need for a valve stem cap - you air and check pressure right through it. I bought a backup pair from Lichtsinn just to have should I ever need to replace them.