Descriptions: 1. Hardness: Round shape fluorine rubber O-ring, has a hardness of 70A and is designed for use in a wide variety of sealing applications.2. Working Temperature Range: This O-ring can be used over a wide temperature range from -22℉ (-30℃) to 302℉ (150℃).3. Advantage: Durable fluorine rubber with resistance to heat, oil, aging, abrasion, ozone, fuel and chemical; Strong sealing and good airtightness.4. Feature: O-ring round in cross-section to provide a seal between overlapping mating surfaces of cylinders. They are commonly seen in engines, flanges, valves and so on.5. Application: Fluorine rubber O-ring provides sealing and prevents leaking for a wide range of applications such as plumbing, machinery, hydraulic and pneumatic repairs, etc. Specifications: Color: GreenMaterial: Fluorine RubberHardness: 70A DurometerOuter Diameter: 90mm / 3.54"Inner Diameter: 80mm / 3.15"Cross-Section Diameter: 5mm / 0.2" Package Contents: 1 x Fluorine Rubber O Ring.