Item Type: Stainless Steel O Ring Material: Stainless Steel Application: Sailing, Diving, Boats and Outdoor Applications in Harsh Conditions, Fitness Rings, Yoga Rings, Dog Rings, Luggage Accessories, Etc. Package List 1 x Ring Please allow an error due to manual measurement. Thanks for your understanding. 1It is made of marine grade 304 stainless steel, which has super strength and rust resistance. 2After high acuuracy polishing, the exquisite and compact shape makes it more practical. 3It is very suitable for sailing, diving and harsh outdoor conditions; it can also be used for luggage, saddles, and hammock yoga rings. 4It is made of high quality stainless steel materials with fine workmanship and no welding marks. 5It not only has an exquisite appearance, but is also durable, and it is not easy to fade, and it will have a longer service life.