3mm to 5mm 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. » Connectors » 3mm to 5mm Coupling Hub This copper coupler can be used for connection of 3mm to 5mm 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 5mm shafts of RC toys, boats and helicopters. Specifications Length: 20 mm Material: Brass Related Products Wheel and Mounting Kit for 35 mm Gearmotors Peltier Thermoelectric Element (TEC1-12706) JGA25-310 DC Gearmotor (795 RPM at 6 V) 50pcs SOT89 and SOT223 to DIP PCB Adapter JGB37-3530 DC Gearmotor (35 RPM at 24 V)