All Rolex Submariner links are Oyster. The oldest models have a hollow center link while newer models have a solid center link. The newest models with a crown at the bottom of the dial between "Swiss" and "Made" use a 16.5mm link. All models without the crown use a slightly thinner 15.5mm link. We carry all versions including stainless steel, 18k yellow gold / stainless steel, and 18k yellow gold.