SRAM XX1 11-Speed Rear Derailleur B-Bolt and Limit Screw Kit MFPN=17-000336 the Matrix Team Cage is

the Matrix Team Cage is engineered and tested to securely hold bicycle water bottles while offering both left and right side-loading action

Designed for 47mm chainline

you’ll find a design with plenty to like: a hi-visibility “Antarctic Survey Orange” front cover and “Polar Night Black” back cover

ABS (air bleed system) chuck to allow release of back pressure and eliminate the chance of unthreading Presta valve cores

SRAM XX1 11-Speed Rear Derailleur B-Bolt and Limit Screw Kit MFPN=17-000336 the Matrix Team Cage isSRAM XX1 11 Speed Rear Derailleur B Bolt and Limit Screw Kit. Upper Bolt and Spring kits for SRAM rear derailleur maintenance and repairs.