3mm to 3mm Coupling Hub Please allow 4-6 days processing before ship out. For gearmotors or similar motors, we don’t ship using epacket and will use regular shipping if needed. Please note that regular shipping like singapore post might take 45-60 days to deliver, epacket 20 -35 days to deliver Thank you for understanding. » Other » 3mm to 3mm Coupling Hub This copper coupler can be used for connection of 3mm to 3mm shafts of RC toys, boats and helicopters. SKU: OTH27407972788 Price: 0.99 $ Product in stock SSL Certificate Quantity Updating cart... This copper coupler can be used for connection of 3mm to 3mm shafts of RC toys, boats and helicopters. Specifications Length: 20 mm Inner Diameter: 3 mm Material: Brass Related Products 24V 5A (120 W) Switched Mode Power Supply JGA25-370RC DC Gearmotor with Extended Axis (322 RPM at 6 V) JGB37-520 DC Gearmotor (22 RPM at 12 V) JGA25-370 DC Gearmotor (26 RPM at 6 V) JGA25-370 DC Gearmotor (646 RPM at 6 V)