2mm 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. » Gearmotors » 2mm to 5mm Coupling Hub This copper coupler can be used for connection of 2mm 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 2mm to 5mm shafts of RC toys, boats and helicopters. Specifications Length: 20 mm Material: Brass Related Products JA12-N30 DC Micro Gearmotor (70 RPM at 6 V) JA12-N30 DC Micro Gearmotor (23 RPM at 6 V) 3mm to 3mm Coupling Hub JGB37-3530 DC Gearmotor (319 RPM at 24 V) JGB37-3530 DC Gearmotor (59 RPM at 12 V)