Specification AgeRangeDescription : adult Brand : DingMotuo BulletPoint1 : [Material Specifications] Copper tube with inner diameter 4.5mm, outer diameter 5mm, length 250mm, suitable for 3.18mm flexible shaft, with excellent electrical and thermal conductivity. BulletPoint2 : [Structural Advantages] The copper tube has high strength and resistance to deformation, which is suitable for high-load scenarios and ensures the stability of high-speed operation of the shaft system. BulletPoint3 : [Applicable scenarios] Remote control boat model propeller drive shaft, especially suitable for gasoline boats or high-power brushless electric boats that need heat dissipation. BulletPoint4 : [Installation method] Directly put it on the outside of the flexible shaft and use it with the bearing bracket to improve the rigidity and concentricity of the shaft system. BulletPoint5 : [Surface treatment] The copper tube surface is smooth and burr-free, which reduces the wear of the flexible shaft and extends the service life of the transmission system. Color : One Color CpsiaCautionaryStatement : no_warning_applicable ExternallyAssignedProductIdentifier : 6494580600745 ItemName : 3.18mm Copper Flexible Shaft Tube, 250mm Length, for RC Boat Propellers, High-Conductivity Marine Drive Shaft Accessory ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flexible-shafts Manufacturer : DingMotuo ManufacturerMinimumAge : 36 ModelName : DingMotuo NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : DingMotuo ProductDescription : Inner diameter 4.5mm Outer diameter 5mm Total length L250mm ProductSiteLaunchDate : 2025-04-11T09:04:39.077Z Size : One Size TargetAudienceKeyword : unisex-adult TargetGender : unisex UnspscCode : 60141000