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 10pcs 52-2.5A Plastic Gear JGA25-370 DC Gearmotor (35 RPM at 6 V) JGB37-3530 DC Gearmotor (20 RPM at 12 V) 2pcs DC Motor with Speed Encoder Disk JGB37-550 DC Gearmotor – High Power (840 RPM at 12 V)