The Flashfender Duo Fixer by Topeak is a durable and lightweight fender made from polypropylene. It is not only stylish but also simple to slide and click into place, making it easy to use when wet weather strikes. The included Duo Fixer allows for fast and tool-free mounting and removal. This fender also has dual functionality, as it can be used with Topeak Duo Fixer system accessories such as QuickClick saddle bags, strap type saddle bags, Tubi tools, CO2 inflators, and lights that can be placed underneath the saddle. The upper part of the fender is compatible with TubiMaster GX DF, NanoMaster DF, TailLux DF lights, and FlashFender DF with upper bracket. The lower part of the fender is compatible with most strap type saddle bags or Topeak QuickClick saddle bags. The fender measures 29 x 8.5 x 2.15 cm (11.4 inches x 3.3 inches x 0.84 inches) and weighs just 26 g (0.92 oz) for the upper part. Please note that the sizes and frame numbers are not mentioned in this description.