These basic "Mini Special" black plastic arches were fitted from 1979 with the introduction of the Mini 20 to about 1996, being fitted on many special edition and even run of the mill Rover cars later in production. They are a cheap, simple, and fairly decent looking option for a flare. This kit includes all four corners, pair of black plastic seam mouldings, and hardware. 
 
Plastic seam mouldings will need to soften in the sun before fitting.