Strap material: stainless steel Color: 16mm white, 16mm gold, 16mm full gold, 16mm black, 18mm white, 18mm gold, 18mm full gold, 18mm black, 20mm white, 20mm gold, 20mm full gold, 20mm black, 22mm White, 22mm gold, 22mm full gold, 22mm black, 24mm white, 24mm gold, 24mm full gold, 24mm black