3D printers consist of various parts and accessories that ensure smooth operation, improve print quality, and expand functionality. Below is a categorized list of essential 3D printer parts and accessories: Extruder, Hot End, Print Bed, and Stepper Motors, Belts & Pulleys, Linear Rails / Rods, Control Board (Main board),Power Supply Unit (PSU),Fans , Z-Axis Lead Screws / Couplers,Endstops / Limit Switches  Filament Runout Sensor,Filament,Adhesives & Bed Prep,Tools & Maintenance,Enclosures,Dry Box / Filament Dryer,OctoPrint Setup,Spare Nozzles,Build Surface Upgrades,LED Light Bars, Vibration Dampeners