"In California "
Brass Knuckle vaporizers are available for purchase in California, however, it can be a little tricky to find them! I would suggest speaking with the budtender at your local dispensary to express an interest in their products. They are easier to find in the Los Angeles area.
Also, please visit the Brass Knuckles website here: https://brassknucklesog.com/
Unfortunately, they do not offer a "Find Us" or "Buy Online" section on their website, but you should be able to follow them on Instagram [@therealbrassknucklesog_/ ] to find out more about their products.
I hope this information helps!