This comprehensive 270-piece HNBR O-ring assortment kit features 18 popular sizes essential for automotive air conditioning repair and maintenance. Specifically designed for R134a systems, these high-quality green O-rings provide reliable sealing solutions for various vehicle AC applications. The kit comes organised in a convenient re-sealable plastic storage case, making it easy to locate the exact size needed. Perfect for professional mechanics and DIY enthusiasts alike, this collection includes commonly used sizes for efficient repairs and replacements. The durable HNBR material is specially formulated to withstand the demanding conditions of automotive air conditioning systems. The clear compartmentalised case helps keep the O-rings properly sorted and protected, ensuring they're ready when you need them. This versatile kit serves as an invaluable resource for automotive workshops and garages, providing a comprehensive selection of O-rings for various repair scenarios.