Nozzle seal for an Ultimaker 3 with a renewed print head assembly. Please note that Ultimaker 3 with an older or original print head assembly require the UM3 Nozzle cover instead, please check the product images to see which version to use. 

The nozzle seal protects the print cores against temperature changes due to airflow, and decreases the risk of extruder damage in case of failed prints. Replace the nozzle seal when it shows signs of degradation.

Not suitable for Ultimaker S3, S5 and S7, the correct seal for those printers can be found here.