Motocross Mom is hand stamped onto a 1.25" aluminum washer topper off with a with Stunt Rider Charm. Comes with an 18" Sterling Silver plated snake chain. Aluminum is a light weight but sturdy metal. It will never rust, tarnish or turn color. More Hypoallergenic than sterling silver. Hand stamping is done by hand one letter at a time with a hammer and a shank. Alignment, spacing and depth may vary which is what gives each piece an individual charm.