SainSmart RAMPS 1.4 3D Printer Kit with Mega2560 + A4988 for Arduino RepRap This is the new SainSmart 3D Printer Starter Kit, developed specially for those who are interested in 3D printer. You will have a complete set of Sainsmart's most common and useful electronic components. You may learn about SainSmart through using these basic projects. SainSmart Mega2560 and A4988 are included. 1-year warranty and technical support dedicated from SainSmart.