Shimano Altus M313 Triple 3x7/8-speed Derailleur

Total capacity: 20D
Assembly type: 34.9mm clamp
Draw type: down swing/top swing
Maximum chainring teeth: 42-48T
Compatible chain: 7/8 speed chain
Adapter Type: 31.8mm & 28.6mm
Cable passage type: double pull
Chain angle: 66-69°
Gear ratios: 3x7/8v