Bolts for pulleys are not included ordered together with a cage.As always, Garbaruk allow for the maximally detailed configuration of your drivetrain components, like no other company does. With Garbaruk oversized rear derailleur pulleys you will be able to achieve the performance and unique bike looks in the best way possibleCNC-machined out of a single 7075-series aluminum bar and color anodized, Garbaruk derailleur pulleys provide extremely lightweight and efficient way to enhance the performance as well as looks of your bikeOur derailleur pulleys are available in various set options, starting from 11T+14T (upper+lower pulley respectively), for Shimano 11-speed rear derailleurs with standard derailleur cage, and 14+14T set for Shimano 12-speed rear derailleurs with standard cage. You can upgrade your standard 11-speed rear mech with our 11T+16T set coupled with Garbaruk RD cage for 11-speed Shimano derailleurs for improved shifting quality (configurable on this page, read more about the cage here).You can even go further, and convert your standard Shimano 11-speed drivetrain by coupling Garbaruk 11-speed cassette for Shimano HG with RD cage+pulley set for Shimano and get up to 455% drivetrain range, comparable with 12-speed drivetrain, configuring each components´ color and choosing from various model options. This way you will be able to squeeze as much as possible out of your 11-speed drivetrain and freshen your bike with unique and high-performance components.Specifications:- Model: Set - 11T + 16T (for 11 sp. with GARBARUK cage) - Made from: 7075-T651 Aluminum Alloy- Surface coating: Anodizing- Made with: CNC milling- Weight, grams: 20 (Set - 11T + 16T)- Compatible rear derailleurs: (11T+12T): SLX RD-M7000-11-GS, XTR RD-M9000. (11T+14T): XT RD-M8000. (14+14T): SLX RD-M7100-SGS, XT RD-M8100-SGS, XTR RD-M9100-SGS. (11+16T): All Shimano derailleurs equipped with Garbaruk cage