This lising is for 2 Pulleys

• Made of super strong Delrin Plastic, rotate with no noise
• Won't hurt your chain
• Narrow Wide design
• Oversize Pulleys and Hybrid Ceramic bearing save Your enegry during riding
  
• 16T, Approx weight: 10g/each, save 80% than your original pulley
• Increases the gear-shifting efficiency by reducing the weight pressure applied to the rear derailleur
• Make sure ur derailleur cage is long enough to fit the 16T pulley, ask me if U are not sure
• Fit with most Sram Medium& Long Cage MTB Rear Derailleur in the market: SRAM Eagle/XX1/X01/X01DH/X1/GX(1X11)-X-SYNC 11sp,
  
• Fit with most Shimano Long Cage MTB Rear Derailleur in the market: M985,M980,M9000,M8000..., but won't fit Shimano Medium Cage
  
• normally won't fit Short Cage Derailleur
• Information about Hybrid Ceramic bearing:
• Bearing Races Material: Chrome Steel 52100
  Ball Material: Nitrided Silicon Ceramic SI3N4
  Enclosure: 2 Rubber Seals