APM necklace

APM necklace (Master Quality original product) accessories? (The items that come with it): If ordered without accessories, it comes: a black box without the brand logo, ____ If ordered with gift accessories: accessories: branded box, velvet cloth with the brand logo, ____________________________ How to care for it? Do not expose it to perfumes and chemicals. Do not expose it to water when washing or performing ablution. Do not expose it to humidity and keep it inside the box. ____________________________ Metal: steel (stainless steel). What is steel? Steel (stainless steel) what is steel?