06-10-2018, 10:46 PM
The material is a kind of felt. It is continuous " ring " which slips over the tank. Dimensions are approx. 1" wide x 1/8" thick. I wouldn't call it a seal, more to prevent fretting between the tank and the bulkhead. When it came to refitting, it was a bit of a b****r. Patience needed to get it correctly placed.