• Made of silicone for use with a variety of s and fluids and has a durometer (hardness) of 70A.
• Kit includes 382 pieces covering 30 dash sizes.
• Plastic case for portability and organized storage.
• For use across a wide temperature range from -76 degrees F (-60 degrees C) to 437 degrees F (225 degrees C).
• Meets standards defined by Aerospace Standard AS568A.

This O-Ring set is made of Red Silicone, has a durometer of 70A, and includes 382 pieces covering 30 dash sizes. The rings have a Round cross-section and can be used across a wide temperature range from -76 degrees F (-60 degrees C) to 437 degrees F (225 degrees C). The rings come in a plastic storage case designed for organization and portability. Designed for use in a variety of sealing applications, this Silicone O-Ring set meets standards defined by Aerospace Standard AS568A for quality assurance. The set includes the following O-Rings: 20 pieces each for dash sizes 006, 007, 008, 009, 010, 011, and 012; 13 pieces each for dash sizes 110, 111, 112, 113, 114, 115, and 116; 10 pieces each for dash sizes 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, and 222; 7 pieces each for dash sizes 325, 326, and 327. Silicone has good resistance to ozone, weather, detergent, salt water, engine and transmission oil, non-petroleum brake fluid, hydraulic fluids that resist fire, vegetable and animal oils, and high molecular weight chlorinated aromatic hydrocarbons. Silicone is vulnerable to mechanical wear and tear, water and steam over 250 degrees F (121 degrees C), aromatic hydrocarbons (benzene), chlorinated hydrocarbons (trichloroethylene), s and bases, and hydrocarbon fuels. The durometer hardness of this Silicone O-Ring is 70A. Durometers measure the hardness of a material and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation. On a scale of 0 to 100, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for rubber, while shore D is used for harder plastics. O-rings provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various AS568A dash sizes as well as Metric sizes. O-ring size is defined by the inside diameter (ID), outisde diameter (OD), and cross-sectional (CS) diameter. What's in the box? * 20 pieces each for dash sizes 006, 007, 008, 009, 010, 011, and 012 * 13 pieces each for dash sizes 110, 111, 112, 113, 114, 115, and 116 * 10 pieces each for dash sizes 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, and 222 * 7 pieces each for dash sizes 325, 326, and 327 * plastic storage case with label to identify sizes