Other Details: -316L Stainless Steel -Posts are 316 L Stainless Steel -Measures 13mm tall ( 1/2") X 9mm wide (3/8") . Posts are 10mm long Ear nuts are 316 L Stainless steel. - 316 L Stainless Steel does NOT tarnish or rust. It is very hard and durable. It has a beautiful luster that can be buffed and polished to remove fingerprints or scratches.