Protects & strengthens Specialized MTB replaceable dropouts.> Protects the dropout from side impact bending> Strengthens interface between derailleur & frame> Fits all bike models using the following hanger models: 9894-4205 (dealer item ) / -4206 (consumer item ) 9895-4020 (dealer item )/ -4021 (consumer item )> Approx. weight: 50g