Derailleur Cage KitAll products of Derailleur Cage Kit SHIMANO 105 12/16T » PreviousNext » Model No EMA-JW1216-SHBKAL105 Catalogue Derailleur Cage Kit Key Features Alloy Derailleur Cage kit system with pulley wheel Upper:12T/Lower:16T (Shimano 105 compatible)TPiPEAK ceramic bearing - Race proven performanceMolded composite material - For superior durability than metal onesDirectional tension pulley - Reduce frictional power loss for quiet and smooth shifting performance Made inTAIWAN