Amazon.com: for Cycle Part for Shimano 8-Degree Shifting Lever Reach Adjusting Block R+L Shifter Gasket for Claris ST-2400 Sora ST-3500 Black - (Color: Left and Right) : Sports & Outdoors
Shimano Tiagra 4600 Right Hand Adjustment Block : Amazon.ca: Sports & Outdoors
Shimano ST-6700 right hand adjustment block 10 mm - Bay Cycles