The roof bars are made in anodised aluminium with aerodynamic profile and a galvanised steel fastening mechanism. They also come with an anti-theft locking device and key. Special legs, caps and covers in treated plastic.   Reference: 5P0071101B Made in anodised aluminium with an aerodynamic profile; galvanised steel fastening mechanism; special legs, caps and covers in treated plastic; anti-theft locking device with key.