1.Stepper motor 20BY 2.for fax Paper cutter,printer, scanner,copy machine, ... .Size:dia.20mm*18mm 4.Long life>3000hrs Permanent Magnet stepper motor 20 BY Typical Application Fax Paper cutter, Printer,Scanner, Copy ... is just for your reference only, all data can customized at your own requirement after our engineer evaluation. DC micro stepper motor 20BY ...