Shimano Tourney RevoShift SL-RS45 3x7 Speed Grip Shifter Set
Bike Twist Shifter Lever | Twist Shifter Grips | Shimano Tourney | Revoshift Grip - Shimano - Aliexpress
Shimano (Revoshift 3 X 7) Shifter Set (New) | eBay
Shimano Handlebar Grips For Revoshift Twistgrip Type Shifters 90mm Or 120mm | eBay
My daughter's Trek came with a 6-speed Shimano Revoshift SIS Index. It's a new bike. She can shift to higher gears easily but does not have the grip strength to shift back
Shimano RevoShift SL-RS25 Twist Grip Shifter -6 Speed Right Black | eBay