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Shimano Tourney Tx50 Thumb Shifter Gear Lever 3 6 7 18 21 Speed Mtb For Mountain Bike Thumb Shifter Plus - Bicycle Derailleur - AliExpress
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Amazon.com : Tourney Shimano SL-Tx30 6-Speed Right & Left (Friction) Thumb Shifter Set : Bike Shifters And Parts : Sports & Outdoors
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