These high-quality AC/HVAC O-rings are essential components for your air conditioning system's quick coupler connections. The kit includes 50 pieces of precisely sized rubber gaskets, featuring an 8mm (0.31-inch) outer diameter and 7.5mm (0.29-inch) inner diameter. These sealing rings are specifically designed for use with R410, R134, R22, and R32 refrigerants, ensuring reliable connections in your 1/4-inch quick coupler hoses. The durable rubber construction provides excellent sealing properties to prevent refrigerant leaks and maintain system efficiency. Perfect for HVAC technicians and professionals, this comprehensive kit offers enough O-rings for multiple repairs or replacements. The black rubber rings are built to withstand the demanding conditions of air conditioning systems while maintaining their sealing integrity. Keep your HVAC system running smoothly with these dependable sealing components.