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. » All Products » 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 Adjustable Step Down Power Supply (30 V, 10 A) JGB37-550 DC Gearmotor – High Power (1580 RPM at 12 V) JGB37-545 DC Gearmotor (22 RPM at 24 V) JA12-N20 DC Gearmotor (78 RPM at 12 V) JGA25-310 DC Gearmotor (77 RPM at 6 V)