1.Stepper motor 20BY 2.for fax Paper cutter,printer, scanner,copy machine,IP camera 3.Size:dia.20mm*18mm 4. ... stepper motor 20 BY Typical Application Fax Paper cutter, Printer,Scanner, Copy Machine, IP Camera Outline size: Diameter: 20 mmLength: 18 ... after our engineer evaluation. DC micro stepper motor 20BY for scanner