Features:
1. Protective Rear derailleur from damaging
2. Universal size suitable for most MTB bikes,road bikes,foldingbicycle

Specifications:
Brand: Rockbros     
Weight: 107g
Material: Aluminum Alloy
Size: 11cm*5.5cm*4cm
Color: Black, Silvery
(Due to the manual measurement,the 1-2cm error is acceptable)