Description
Used to determine if the inside diameter (orifice) of a vent-liner has opened enough (.036″ or larger) that it should be replaced. If this pin passes through, replace the vent liner. Made in USA by Vermont Gage.

Many uses for measuring holes/orifices beyond muzzle loading (automotive applications, etc).









chris (verified owner) –
Easy to deal with and fast and shipping
Anonymous (verified owner) –