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HVAC Air Conditioner Connection Pipe Kit Insulated Copper Pipe. Premium Copper Material: 99.9% pure copper pipes meeting ASTM B280, C12200, and JIS H3300 standards. High Pressure Rating: Pressure rating from 2100 to 7000 PSI, exceeding 700 PSI standard for R410A systems. Customizable Sizes: Available in 1/4" to 1-1/8" sizes with custom lengths of 15m to 50m. OEM and ODM Service: Accepts logo printing and full customization from samples or designs. Versatile Applications: Suitable for ductless mini-splits, heat pumps, and centralized air ducted units. 1-Year Warranty: Comes with a 1-year warranty and online after-sales service support. ISO9001 Certified: Manufactured under ISO9001:2015 management system certification.