This is typically used with Radium 20-0462 DSV, 12AN ORB to 12AN Male, Quick Fill. It includes an air filter and a 12AN female adapter fitting. The kit requires a 12AN male vent fitting.
NOTE: Because the top of the fuel fill tube should not be higher than the location of this air filter, this is commonly used in conjunction with direct fuel cell fill caps only (not remote fillers).