Quakers Hill Detectives have asked for help from the public following an armed robbery at the United Service Station at Windsor Road, Vineyard.
Two males held up the service station at about 9.45pm on January 29.
They were described as in their early 20's, Caucasian, 180cm-185cm tall and medium to solid build.
One of the men had a distinctive tattoo on the top of his right hand, which was described as a map of Australia.
It is believed the men frequent the Rouse Hill and Riverstone areas.
Anyone with information: Quakers Hill Detectives on 9678 8999 or Crime Stoppers on 1800 333 000.