Graco Replacement Back Cap O-Rings are compatible with various Graco Fusion AP models. Its durable construction withstands the demanding conditions of spray foam and coating applications, ensuring long-lasting reliability. Technicians often keep this part on hand as part of routine maintenance kits, facilitating quick replacements and minimizing service interruptions. By using genuine Graco parts like the 248136, users can maintain the efficiency and longevity of their equipment.