Standard fill nipple o-ring (size 006). Molded from 90 durometer polyurethane for the ultimate durability and dependability.
If your HPA tank is leaking from the fill nipple after filling, it means your o-ring is worn out or damaged and requires replacement. Quickly get your air tank back in working order with Captain O-Ring's replacement fill nipple o-rings.
Fits fill nipples (foster fitting valves) that use the 006 size o-ring in paintball, airsoft, air guns, and more.
