Vanadium nozzles are hardened and tempered in depth, not just on the surface.
Key features: Made of super rapido vanadium alloyed steel for superior abrasion resistance at both print and room temperatures. Surface coated with a wear-resistant plastic repellent coating to keep the nozzle as clean as possible. With the Vanadium nozzle there is no need to know the diameter or read a chart, the orifice size is etched on 3 sides for easy viewing. Compatible with common metric (6 mm) and standard (1/4 in) socket tools for easy installation. A lifetime warranty against abrasion. Manufactured 100% in the United States.
For more information you can refer to the manufacturer's website:
https://www.sliceengineering.com/pages/documentation
The item you will receive may differ in some features from the one depicted in the photo, depending on the production batch. Despite this, functionality is maintained.