Part number:Rosilesie1b6i5qfwn Item Weight:150 g Product Dimensions:17 x 15 x 4 cm; 150 Grams Item Package Quantity:1 Package Includes: 1 x RAMPS 1.4 Board 1 x Mega 2560 R3 Board 5 x Soldered A4988 Drivers 5 x Heat Sinks 1 x USB Cable 19 x Jumpers Specifications: RAMPS 1.4 Size: 9.1 x 5.9cm / 3.58 x 2.32" Mega R3 2560 Size: 10.8 x 5.5cm / 4.25 x 2.16" A4988 Color: Green A4988 Quantity: 5pcs About this item The RAMPS 1.4 board is designed to fit the entire electronics needed for a RepRap in one small package for low cost Additionally, a number of expansion boards can be added to the system as long as the main RAMPS board is kept to the top of the stack The modular design includes plug in stepper drivers and extruder control electronics on an MEGA shield for easy service, part replacement, upgrade-ability and expansion RAMPS interfaces an Mega with the powerful MEGA platform and has plenty room for expansion With the boot-loader, download the program directly via USB without having to go through other external writer The RAMPS 1.4 board is designed to fit the entire electronics needed for a RepRap in one small package for low cost Additionally, a number of expansion boards can be added to the system as long as the main RAMPS board is kept to the top of the stack The modular design includes plug in stepper drivers and extruder control electronics on an MEGA shield for easy service, part replacement, upgrade-ability and expansion RAMPS interfaces an Mega with the powerful MEGA platform and has plenty room for expansion With the boot-loader, download the program directly via USB without having to go through other external writer