2pcs Coupling Hub for 4 mm Shafts 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 » Accessories » 2pcs Coupling Hub for 4 mm Shafts This coupling hub allows secure coupling of a variety of mechanisms to 4 mm motor shafts. SKU: JSL13282219971 Price: 9.57 $ Product in stock SSL Certificate Quantity Updating cart... Overview This coupling hub allows secure coupling of a variety of mechanisms to 4 mm motor shafts. Specifications Length: 15.5 mm Inner Diameter: 4 mm Outer Diameter: 22.5 mm Related Products JGB37-3530 DC Gearmotor (7 RPM at 24 V) 2mm to 5mm Coupling Hub JA12-N30 DC Micro Gearmotor (235 RPM at 6 V) JGB37-3530 DC Gearmotor (1600 RPM at 12 V) JGA25-310 DC Gearmotor (795 RPM at 6 V)