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4 Packs 4Mm To 4Mm Steel Universal Joint Cardan Coupling Connector, Rotatable Model DIY Motor Shaft Fitting Accessory High-quality material: The common connection nut is fabricated from advantageous alloy metallic material, which is robust and durable.CNC mechanical design: 4mm motor coupler has a unique design, perfect workmanship, exact size, convenient and brief installation and disassembly.360-degree rotatable common joint: This 4x4 mm joint count can exchange the transmission course at any point, which is terribly flexible and straightforward to use.Application: 4 mm rotation coupling is perfect for handheld remote control mannequin vehicles and handheld remote control model boats, as well as ideal motor shaft assembly accessories.Material:alloy steelcolour:SilverPackage Contents:4 x Cardan Coupling Connector8 x screws2 x WrenchOnly the above kit content, other merchandise are not included.Note: Light capturing and assorted reveals may cause the color of the item in the picture a little diverse from the genuine thing. The measurement allowed error is +/- 1-3cm.