Material: Fluorine Rubber Color: Green Outer Diameter: 18mm / 0.71" Inner Diameter: 13.2mm / 0.52" Cross-Section Diameter: 2.4mm / 0.09" Package Contents: 10 x Fluorine Rubber O Rings 1.Round shape fluorine rubber O-ring, has a hardness of 70A and is designed for use in a wide variety of sealing applications. It can be used over a wide temperature range from -22℉ (-30℃) to 302℉ (150℃). 2.Durable fluorine rubber with resistance to heat, oil, aging, abrasion, ozone, fuel and chemical; Strong sealing and good airtightness. 3.Fluorine rubber O-ring provides sealing and prevents leaking for a wide range of applications such as plumbing, machinery, hydraulic and pneumatic repairs, etc.