Specification： 1/4"-1/2" copper pipes 3 layer insulation Copper flare nuts Piping Kit Length:16 Ft Feature： One Pipe with 1/4" OD and Other Pipe with 1/2" OD (Fits MOST 12,000 BTU and 18,000 BTU Systems) Highest Quality Full Copper Piping Kit Set. Compliance with ASTM-B280 Standard (USA-Canada). Dehydrated Soft Drawn Copper Tubes. Three Layer Water Proof P.E. Insulation. Copper Flare Nuts, on ready formed flare ends. Package Including： As The Picture Shows .
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