Shimano I-Spec A, B ,II and EV mounts explained - BikeRadar
Amazon.com: ShiftMount Integrate Shifter Mount Matchmaker I-SPEC II Clamp Band Adapter for Shimano I-Spec II clamp Brake Lever Integrate Sram Trigger Shifters Lever (Left) : Sports & Outdoors
I-Spec B Handlebar Clamp 22.2mm Adapter For Shimano Shifter 3D Printed | eBay
Handlebar Clamp Adapter for Shimano I-Spec B Style Shifter : Amazon.co.uk: Sports & Outdoors