The PAI 14mm copper style fuel sealing washer features a durable copper construction designed to enhance fuel seal integrity and reduce leak potential. Copper's excellent thermal conductivity enables it to withstand high-temperature environments effectively. Its corrosion-resistant properties ensure prolonged lifespan even in harsh conditions, providing consistent sealing performance and minimizing maintenance needs over time. Additionally, copper's natural malleability allows for proper distribution under bolt tension, maintaining effective sealing under various operating conditions.