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. » Connectors » 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 20pcs XH2.54-5P Straight Pin Header and Connector GY-ADS1115 ADC Module ISD1820 Voice Recording and Playback Module with MIC JGA25-370 DC Gearmotor (84 RPM at 24 V) ESP8266 ESP-12F Wit Cloud Development Board