⋆14K Gold Filled Religious Disc Charm ⋆Hoops are 14K Gold Filled ⋆Hoops available in the sizes Small(12mm), S/M(14mm), Medium(16mm), Large(20mm) and XLarge(24mm)
⋆Gold filled components contain 100 times more real gold than flash gold plated components and are very durable and tarnish resistant
You can find more information about the materials and durability here.