Okotech by Aparna Enterprises Ltd delivers lead‑free, European‑standard uPVC window & door profiles—60+ customizable designs engineered for durability, energy efficiency, acoustic insulation, weather resistance and high-rise strength. Recyclable, low‑maintenance solutions with multi‑chamber steel reinforcements. https://www.aparnaenterprisesltd.com/products/upvc-window-door-profiles/