Washer for filling screw w/gauge(gauge is part 149)this is-Part 11
(A BriteLyt XL part) replacment for 149 gauge this keeps the lantern from leaking pressure on all 150CP,250CP,350CP, and 500CP lanterns (or HK Lanterns).
NEW: Viton rubber provides proven resistance to chemicals and extreme termperatures.
USED in all new BriteLyt XL multi-fuel lanterns will be green color, over time we are gradually shifting all of our Viton components over to natural brown.
Orders for part 11 can be in Viton Brown or Green color.