Check the listing for details. [3DMakerWorld] 3D Solex UM2 Heater. Condition: New. Listed at 37.85 USD. Key Features: Individually tested heater cartridge Works with Ultimaker 2 and Ultimaker 2+ We know how frustrating and time consuming it can be to change a heater. This product is a consumable and as such has no guarantee, much like tires of a car. 3D Solex's heaters are individually tested to withstand one year of use. When you have a 50W heater, your head will heat up incredibly fast! The theoretical downside, is that we cannot guarantee that it will work when there will be a dual upgrade for UM2 which needs 2 heaters. It may then be approaching the limit of the available power of the machine. Item Specifics Weight: 0.020 kg Size: 8 × 6 × 1 cm Warning: May not work in “Olsson Block” clone! The calibre of the sensor holes are sometimes out of spec. They need manufacture to tolerances within 6/100 of a millimeter. If the hole is too large, the heaters will not be able to transfer energy, and burn out very brightly inside your block!