Built for dependable everyday performance, the Oil Capillary /mineral -GALLON-QRO-300-G is a professional-grade copper tubing product ideal for refrigerant line installations in air-conditioning and refrigeration systems. Its robust construction ensures lasting durability and trouble-free operation over years of service. It combines affordability with solid, service-proven performance, making it a smart choice for cost-conscious repairs. Ideal for professional installers and DIY repairs alike, it belongs in every well-stocked chemicals and consumables inventory. Shop now for a dependable copper tubing product and keep your cooling equipment performing at peak efficiency.