Heater block nozzle set compatible with Ultimaker 2 + UM2 Extended 3D printer Olsson Block Hotend, interchangeable nozzle, 3.0mm

["This nozzle block set is improved, compatible with Ultimaker 2, with the nozzle and heater block as two separate parts. They can easily change the nozzle size. Includes 4 nozzles: 1 piece 0.25 mm + 1 piece 0.4 mm + 1 piece 0.6 mm + 1 piece 0.8 mm"]