Mainly including 2 fans, fan cover, heat block, cooling block, nozzle, throat pipe, connector, cable, tube, etc. Stainless steel material nozzle throat and high quality resistance whose temperature can up to 260 °C/ 500 °F. Nozzle and tube connect seamless, prevent material leaking and blocking. Heating tube, 24V 40W. Durable and good performance, fully assembled, you can install directly, good kit for your 3D printer. ">