100 brand new and high qualityDiameter:28mm/1.10 inchLength:274mm/10.79 inchStep angle:5.625 x 1 / 64Reduction ratio:1 / 645 Line 4 phase can be driven by ordinary uln2003 chip can also be connected in phase 2development board used for.supporting the use of a direct plug and easy to use stepper motor used in the development board.Stepper motor driver board with ULN2003A, B, C, D four-phase LED indicates the status of the stepper motor workStepper motor with a standard interface, when used directly pluggablematerial:CCLcolour:greenpacking include:1 x Drive Module Board ULN20031 x Stepper motor 28BYJ-48Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.