Cartridge heaters are widely used in industrial equipments in different fields, mold machinery, packing, mask production equipment, blow woven machinery, shoes machine, chemical equipments, 3D printers etc. And the sizes varies for different equipments from smallest diameter 3mm. Voltages can be low voltage 12V and AC voltage 220V. They are totally customized heaters.
The mexico customer is a wholesale customer and the cartridge heaters are mixed sizes for totally 2018pcs. Thank you for your trust and we will make your support deserve. :)