Shaft Adapter 4mm to 1/4 inch for Elma Switches, 1,02 €
3mm To 5mm Brass Joint Motor Shaft Coupling Adapter Connector For Rc Aircraft With Screws And Allen Wrench Pack Of 2 - Shaft Couplings - AliExpress
4 Pack 3mm-5mm Flexible Shaft Coupling Connector for RC Boat and Motors : Amazon.sg: DIY & Tools
GKTOOLS D9L20 2mm/2.3mm/3mm/3.17mm/4mm/5mm/6mm Brass Flexible Motor Shaft Coupling Coupler Motor Transmission Connector - Price history & Review | AliExpress Seller - GKTOOLS Official Store | Alitools.io
Shaft Adapter 6mm to 8mm, 3,58 €
Aluminum Flex Shaft Coupler - 3mm to 5mm - BC Robotics
2mm to 5mm Bore Rigid Coupling, 20mm Length 9mm Diameter, Copper Shaft Coupler Connector, Brass Tone - Newegg.com
Shaft Coupler 3mm x 5mm Connector Adapter for RC Airplane Boat Motor L25XD10 - Walmart.com
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Amazon.com: Steel 3.175mm (1/8 inch) to 5mm Pinion Reducer Sleeve Adapter Shaft Motor Axle Change-Over for Converting RC Motor 3650 550 540 Pinion Gears, Set of 3 : Toys & Games
Hobbywing RC Model Motor 3mm 5mm Shaft Adapter AC166 for sale online | eBay
5mm to 3mm Shaft Coupling For Quanum Aquaholic / Relentless Racing Boats
3mm To 5mm Brass Joint Motor Shaft Coupling Adapter Connector For Rc Aircraft With Screws And Allen Wrench Pack Of 2 - Shaft Couplings - AliExpress