Stainless Steel Spinner Ring with the OM Symbol Engraved in Black Anamel This Spinner Ring Has the OM Symbol Engraved in Black Anamel It is Manufactured With Stainless Steel in High Quality 316L Surgical Steel (Non Allergic Material) It Comes in Assorted Sizes From 8 To 13 American Scale. Ring Width: 5/16 inch (8 mm)