Shimano Dura-Ace ST-R9180 Di2 TT Shifter/Hydraulic Brake Lever Set with BR-R9170 Flat-Mount Brake Caliper and J-Kit Fittings, Rear/Right - In The Know Cycling
Amazon.com: SHIMANO SW-R671 Di2 Shift switches for TT / Tri Bars, 2 Button, E-Tube, Left Hand : Clothing, Shoes & Jewelry
Shimano Dura-Ace R9160 Di2 TT Bar End Shifters, 1-Button Design, Syncro Shift compatible | Tree Fort Bikes