Revolver Safety Seal can easily be placed over the revolver cylinder nipples to prevent moisture from getting into the powder of preloaded cylinders. Also will safely protect from accidental ignition.
Safety Seals can be placed on cylinder while in the gun by simply cutting the ring open as shown and placing seals on nipples while rotating the cylinder.

2 seals per package

WARNING: DO NOT USE OVER CAPS, NOT FOR PREVENTING ACCIDENTAL FIRING OF CAPPED NIPPLES!!!!