The Dichtomatik AS568-109 O-Ring features a 5/16" inner diameter, 1/2" outer diameter, and 3/32" thickness, crafted from HNBR material for superior resistance to heat and chemicals. This O-Ring is ideal for sealing applications in automotive and industrial environments, providing a reliable barrier against leaks. Its design adheres to AS568 standards, ensuring compatibility with a wide range of fittings and systems. The green color indicates its high-performance capabilities, making it a preferred choice for professionals.