Aluminum profile (extrusion) — complex cross-section linear products obtained by forcing a heated billet through a die (matrix) on an extrusion press. Alloy AD31 (6063): primary for construction — translucent structures (windows, doors, stained glass), curtain wall facades, railings, fences. 6061 — structural, for load-bearing elements. 6082 — increased strength. Anodizing: oxide film 10–20 µm (silver, bronze, black). Powder coating: polyester (RAL catalog), PVDF (for facades, 25 years). Thermal barrier: polyamide insert for 'warm' profile (Uf ≤1.6 W/m²·K). GOST 22233-2018 (construction). Standard and custom profiles. Minimum order quantity for custom — from 500 kg (die manufacturing 2–3 weeks). 'Warm' profile with thermal barrier (polyamide insert): for windows and facades of energy-efficient buildings. Uf ≤1.6 W/m²·K — meets the requirements of SP 50.13330 for most regions of Russia. Without thermal barrier Uf = 5–7 W/m²·K — freezing in cold climates.