82188218, 0.2 mm Japanese: Shaft Diameter: ф10 mm (ф 12 mm Internal) Shaft Length: 9.5 mm: Motor Diameter: ф89 mm: Motor Rotor Inertia: 3.260 kg*cm^2: Motor Length: 54.2 mm: Motorrtl8218d-cgrealtek()¥24.84lqfp-128-ep(14x20)rtl8218d-cgpcbdatasheet