<ul><li>7/8/9/10/11/12 speed chain support, works for Shimano and for Sram. Compatible to 7-12s system.</li><li>Works to all brand of 12s chain, except the axs flattop 12s road bike chain.</li><li>Hybird ceramic bearings. Low friction and almost zero resistance. Make your riding easier. Offer smooth riding experience and low noisy.</li><li>Body aluminum and full CNC process, then anodized surface treatment. Lightweight 9g to 13g from 11T to 16T.2 colors for choice, black and oilslick.</li><li>1 Year Quality Coverage. Package Content: 2* pulley wheels, 2* adapters for 4mm to 6mm, 2* adapters for 5mm to 6mm(you have to use the adapter of 5mm to 6mm in 95% conditions).</li></ul><br><br>

DJC Bike Ceramic Bearing Pulley Wheel 2pcs Guide Roller 11T 12T 13T 14T 15T 16T MTB Road Bike Rear Derailleur for Shimano for Sram Pulley oilslick (oilslick, 2pcs 12T)