Adopting the design of two-way pulling that supports for both pull-up and pull-down wiring, this front derailleur has nice practicability and high compatibility, and it can provide you with precise adjustment with the premium screw that can control H/L adjustments.Forged from the choice material and this front derailleur has high rigidity, good abrasion and rust resistance, which has long service life, direct force transmission and sensitive speed change.and steel are the materials used to make this front derailleur, which is exquisite and durable.12cm is the length of this front derailleur, 9cm is the width and 6cm is the height of it, and there are three s of 7/8/9-speed, 10-speed and 11-speed for you to choose.This front derailleur supports 30.8/31.8/34.9mm pipe diameter and three-teeth chain wheels that have 42-34-24T.Item Name: Front DerailleurMaterial: Steel,Aluminum Alloys: 7/8/9-speed, 10-speed and 11-speedFeatures: Sensitive Speed Change, Precise Adjustment, High CompatibilityApplicable Range: 30.8/31.8/34.9mm Pipe Diameter, 42-34-24T Three-teeth Chain WheelsSize Details: 12cm x 9cm x 6cm/4.72" x 3.54" x 2.36" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Front Derailleur1 x Gasket