This Deep Purple 12" Limited Edition Single 5216 features the hit song "Knocking At Your Back Door" on black vinyl at 45RPM. Released in 1985 by Polydor Records in the United Kingdom, this heavy metal record comes in a original Picture cardboard sleeve and is considered to be in very good plus condition. With original cover art and a new wave of British heavy metal style, this limited edition single is a must-have for any rock and hard rock music collector.