Wangdd22 3D Printer kit RAMPS 1.4 Control Panel Printer Control Reprap MendelPrusa +5 pcs A4988 StepStick Stepper Motor Driver Module with Heatsink for 3D Printer.<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>RAMPS 1.4 expansion board as a driver expansion board， can be used for engraving machines， 3D printers.and It is a total of five slots， can drive five A4988 stepper motor.</li><li>Stepper motor wiring as follows: 2A， 2B is a group (red， green)， 1A， 1B is a group (blue， yellow)， if want to change direction， can be change the position of one group ， for example 2A， 2B mutually exchanged.</li><li>Flexible set: 1pcs RAMPS 1.4 Controller Board+ 5pcs A4988 Stepstick Stepper Motor Driver Module with Heat Sink on your Arduino-compatible MEGA shield for easy service， part replacement， upgrade-ability and expansion.</li><li>Each road stepper motors only need two IO ports.</li><li>Step five selectable modes: full ， 1/ 2， 1 / 4， 1 / 8 and 1/ 16</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51HlCDP853L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51wSMh9gNSL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51zRyY4vG5L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/511qURcliFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51DLS-YKfhL.jpg" noproxy>