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. » Gearmotors » 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 10pcs LM386 Audio Amplifier (DIP-8) JGB37-3530 DC Gearmotor (1000 RPM at 12 V) JGB37-520 DC Gearmotor (200 RPM at 24 V) 10pcs 1 x 40 Breakable Female Pin Header 50pcs 2n2222 TO-92 NPN Transistor