TRP HD 3.4 Shift Lever Adapter Shimano I-Spec B to I-Spec II

TRP HD 3.4 Shifter Adapter - Makes Shimano I-Spec B compatible with I-Spec IIWith the HD 3.4 adapter by TRP, you can attach a Shimano I-Spec II shifter to a TRP brake lever with Shimano I-Spec B mount, such as those used for the Slate or Quadiem disc brake