Copper tubes for air conditioning and refrigeration systems (primary use in refrigerant circuits), water supply (drinking water — copper has bactericidal properties), heating, gas supply, and medical gases. Grades: M1, M2 (Cu ≥99.9%). Diameter: 6–108 mm. Wall thickness: 0.5–3 mm. Condition: soft (annealed, in coils — for air conditioning) and hard (in straight lengths — for water supply). GOST 617-2006 'Copper Tubes'. Packaging: coils 15–50 m (soft), straight lengths 3–5 m (hard). Export documentation: Certificate of Analysis (CoA), Certificate of Origin. Exports to China, EAEU, Middle East, Southeast Asia.