b'Photoluminescence Chain Selection ColourColorssLeather Stainless Silver TransparentPink Red Yellow Clear Green BlueOpaque1.8mm 1.8mm 1.8mmThick Thick ThickAqua Green White Navy Blue BlackThe Serenity Glass collection comes standard with eitherMulti - Coloreda leather cord or a stainless steel snake chain. All chains available in 18, 20, 22, 24 lengths or upgrade to a sterling silver thick chain.Amber Purple Caramel Blue Green Deep Purple20 Serenity Glass Collection'