The T-25 regulator is machined from solid bars of Titanium Ti-6Al-4V alloy. It is then plated with a new proprietary diamond-like hardness coating (DLC). This produces a radiant, iridescent color sheen dubbed “Burnt Titanium” to reflect its stunningly beautiful, durable and unique finish.The T25 Burnt Titanium finish is highly unique, no two regulators appear the same. Of course, it’s not really burned. The T25’s coating has a near Diamond-level super hardness that will perform in the water for years of use. While the “Burnt Titanium” coating is very hard and can resist normal wear from diving, it can be damaged, so avoid impact and excessive rubbing with pool decks, boat decks or swim steps.