3D printers are complex machines. Most of their components like the frame, pulleys, print bed, and metal rods usually leave too much room for customization or improvements. Other 3D printer parts, on the other hand, like the extruder, hotend, print-bed and nozzle are easy to customize, adjust and calibrate. a lot can also be done in the way of post-processing 3D printed objects. And the basic items needed to upgrade, extend, and accessorize your 3D printer. This list of 3D printer parts and accessories has been put together on our website, found in the 3D Printer Parts & Accessories category, and is strongly based on the best selling products in that category.