Ultimaker 2+ Maintenance Kit The Ultimaker 2+ Maintenance Kit contains the most commonly used replacement parts for the Ultimaker 2+ or Ultimaker 2 Extended+. It can be purchased in addition to your Ultimaker and used as an overall maintenance kit, or it can be used for spare parts. This Maintenance Kit includes the following components: 1x Glass plate 1x Bowden tube 1x PT100 B sensor 1x Heater cartridge 1x Magnalube 1x Machine oil 1x Calibration card 2x Build plate clamp 2x Clamp clip 2x Tube coupling collet 1x Hot end isolator 4x Olsson nozzles (0.40, 0.25, 0.60 and 0.80 mm) 2x TFM isolator coupler 1x Print head alignment aid 1x Hot-end cooling fan 2x Print cooling fan To keep your Ultimaker 2+ in optimal condition, Ultimaker recommends the following maintenance schedule, based on 1,500 printing hours per year: Every Month - Clean printer and lubricate axles. Every 3 Months - Check for play on axles, check tension of short belts, lubricate lead screw Z motor, and re-tighten hot end isolator. Every Year - Clean feeder and replace bowden tube. Note: If the usage frequency is higher, please increase the frequency of maintenance on your machine to maintain optimal printing results.