Cim-Tek 60002 Pre-Vent 2 inch NPT(M) tank breather cap with anti-theft locking armCim Tek 60002 Pre Vent 2 inch NPT(M) tank breather cap with anti theft locking arm Widely used on small ground farm, commercial petrol and distillate tanks, fuel transfer and small oil storage tanks and industrial oil transfer tanks. Features: fill cap and breather anti theft lockable security arm pressure and vacuum release that reduces evaporation in fuel storage tanks helps maintain the quality of stored fuel. helps to maintain fuel quality by