Daily maintenance: For daily maintenance, wipe with a soft cotton cloth to keep it shiny. If there are obvious stains on the surface of the jewelry, it can be washed with warm water, wiped gently with a soft cotton cloth and neutral detergent, and then wiped dry after cleaning. Non-strong acid, strong alkali environment, no need for deliberate maintenance. When wearing, avoid being scratched by sharp objects and damage the surface finish. Product material: stainless steel Length: 18+3cm Weight: 19.5g No harm to human body, no pollution, no deformation, no discoloration, rust-proof and durable. Our collars are safer and more comfortable on the skin. Packing List: 1 Piece