Product information:

Applicable models: 21/24/27 speed-spinning hub mountain bike/road bike
Product material: Wear-resistant alloy steel
Product color: Anti-rust electric crossing silver

Color Classification:
1style: Hexagonal tool + finger dial [3 gears from the left]
2style: Hexagonal tool + finger dial [7 gears from the right]
3style: Hexagonal tool + finger dial [8 gears from the right]
4style: [Left 3, Right 7 Gears] 21-speed pair
5style: left 3 right 8 gears] 24 speed pair
6style: TX50 front derailleur + chain remover

Packing list:
Accessories x1