Feature: 1. MUST HAVE FOR DIVING EQUIPMENT: Diving O rings are suitable for Nitrox diving equipment to ensure smooth breathing and ensure the smooth running of diving activities. 2. SEALING AND WATERPROOF DESIGN: O rings can effectively waterproof and seal, protect the oxygen hose and ensure the normal operation of diving equipment. 3. WIDELY USED: Suitable for all kinds of diving activities, such as diving tourism, underwater photography, etc., widely used in different scenarios. 4. DURABLE AND RELIABLE: Made of premium plastic material, durable and reliable, ensuring the long lasting use of diving equipment, so that you can enjoy the fun of diving with peace of mind. 5. SAFETY GUARANTEED: The use of diving O rings not only guarantees the normal operation of diving equipment, but also protects your safety, so you can explore the underwater world with confidence. Specification: Item Type: Diving O Rings Material: Plastic Weight: Approx. 95g / 3.4oz. Package List: 170 x Diving O Ring1 x Storage Box1 x Tweezer