GLOSS BLACK PERFORMANCE LOOK SIDE EXTENSION BLADES FOR BMW 1 SERIES F20 F21 2015 2018 FACELIFT M SPORT MODELS ONLY Constructed from PP plastic materials. These extension blades will fit under the existing M SPORT side skirts. Aftermarket side skirts Comes in GLOSS black finish with metal self tappet screws. (instructions not provided, please seek professional installation) You will receive left and right side extensions. Installation from experienced bodykit installers and not normal DIY or mechanic installation. Genuine HZ Dynamics Product