These are nozzles for High Flow applications, They are manufactured by Bondtech in-house., Compatible with 2., 85mm filament Avantages de la technologie Bondtech CHT® : Les buses Bondtech CHT® divisent le filament en 3 brins plus fins, ce qui permet de faire fondre le matériau de l'intérieur Bondtech Heat Block Nozzle SOLDES : Bondtech CHT Vol Coated Brass Nozzle - 0,4 Mm -1 Pcs Bondtech Nozzles In doing so, the material melts faster and higher flow rates can be used.