Empty Chamber Safety Flags – package of 6 Bright Orange in color, molded from Impact Resistant Polymer for Maximum Durability. The curved shape allows for easy insertion into an empty chamber providing Reliable Confirmation of unloaded Chamber. Reinforced large-bore style (.22 caliber - 12 gauge) Stark Chamber Flags Clearly show that a weapon is unloaded, especially useful at the shooting range. Firearms safety rules should always be observed.