ITEM NAME:2Pcs RC Boat Flexible Coupling CNC Stainless Steel Flex Collet Coupler,5X4M B4H9 2Pcs RC Boat Flexible Coupling CNC Stainless Steel Flex Collet Coupler,5X4M B4H9 Product Name:Flexible Coupling Use:ï ¼Å¸Vehicles & Remote Control Toys RC Parts & Accs:ï ¼Å¸Connectors/Wiring Four-wheel Drive Attributes:ï ¼Å¸Assemblage Tool Supplies:ï ¼Å¸Assembled class Connect to Flexible Shaft :4mm Connect to Motor Shaft:5mm Colour:silver Material:metal Package Contents: 2*Flexible coupling 1*accessories set.2 Flexible coupling. RC Parts & Accs:ï ¼Å¸Connectors/Wiring. Connect to Flexible Shaft :4mm. Connect to Motor Shaft:5mm. Tool Supplies:ï ¼Å¸Assembled class.