Securely protect your HVAC outdoor system with our durable 1/4 inch locking caps. Designed specifically for standard HVAC lines, these caps will provide a tight seal, effectively preventing air leaks and maintaining optimal performance. Crafted from high-quality materials, they are engineered to endure the rigorous demands of both residential and commercial HVAC applications. Whether you are capping off lines during installation, maintenance, or repairs, these locking caps serve as a reliable solution. Their secure fit ensures simplicity during installation, contributing to the efficient operation of your HVAC system. By using these essential HVAC components, you will promote a well-functioning system that stands the test of time. Invest in our locking caps today and experience peace of mind knowing that you're enhancing the longevity and efficiency of your HVAC system. Don't compromise on quality; choose our locking caps for unparalleled protection and performance! 1/4 inch HVAC Locking Caps Refrigerant Locking Caps Made From Quality Yellow Brass For Many Years Of Protection. Pink (Caps are Keyed R22) For Extra Protection. (Key Sold Separately)