Cheap cht nozzles are fully made out of brass and the insert is

Nozzles Bondtech CHT Spider (coated brass)

Brass Nozzles, CHT 3D Printer Brass Nozzles Heat

They are manufactured by Bondtech in-house,and will fit the following hotends/blocks:, Mosquito® / Magnum, Mosquito® Liquid, Mosquito® Magnum+,

Bondtech CHT® Coated Brass Nozzle

Brass 3D Printer Nozzles

Bondtech CHT Coated Brass Nozzle Pack

E3D Revo™ High Flow Nozzles

Bondtech CHT® Coated Brass Nozzle 5 pack (Volcano Compatible

Nozzles Bondtech CHT Spider (coated brass)

Bambu lab cht nozzle size 0.4mm brass nozzle for Bambu Lab X1 and