Thanks for jumping in here Dave. They are 11" on the 3600, went
to 12" on the 3800.
http://www.pbase.com/dennygraham/image/160723376

I'd sure appreciate it if you could come up with a pair. They so
rarely need to be replaced that no one stocks them. By the time
a damper spring is rusted out the drums need to be replaced.

Denny Graham
Sandwich, IL


Denny G
Sandwich, IL