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. » All Products » 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 JGB37-545 DC Gearmotor (35 RPM at 24 V) JGA25-370 DC Gearmotor (915 RPM at 12 V) 10W LED with Color Temperature of 6000-6500 K JGB37-3530 DC Gearmotor (35 RPM at 24 V) Remote E3D v6 3D Printer Head (0.5 mm nozzle, 1.75 mm filament)