2mm to 5mm Coupling Hub Shop: There may be some days to weeks delays in deliveries. 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: 0.94 $ Old 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 JGB37-3530 DC Gearmotor (333 RPM at 12 V) JGA20-130 DC Micro Gearmotor (60 RPM at 12 V) JGA25-370RC DC Gearmotor with Extended Axis (133 RPM at 12 V) JA12-N30 DC Micro Gearmotor (23 RPM at 6 V) 20pcs 2 x 40 mm Shaft