RadianceTitanium... simply the best! Ti is hypoallergenic, whereas stainless is not. There are some who are allergic to the small amount of nickel present in stainless steel. Stainless is much more wearable than the brass, aluminum, copper, and bronze metals that I use for various products.
I do plan to make both the single bill and double bill versions available in stainless.
Thanks for your interest!
~Frank