NBR70 Rubber 'O' Rings The most common and simplest types of seal with excellent sealing properties and durability. Used in engines and gearboxes, also found in anything from shower heads to an aircraft, garden hoses and pumps etc., They can be used as face to face gasket style seals or as shaft seals and allow both rotary and linear movement. They have a 70 Shore hardness and an operating temperature range of -30C to +120C. Highly resistant to many chemicals, petroleum, diesel, LPG etc. All sizes to BS4518. Many other sizes and materials in stock. A full range of other sizes are also available. Please ask for details.