Essential Tips (60 seconds to read) 1.?For the Product Curvature/Deformation Problem? Lay the product flat, cover it with a clean cloth, warm evenly with a hair dryer on LOW heat (keep 15-20cm away), then press flat with heavy books for 4+ hours. It will fully restore to a straight shape with no permanent bend. For severe deformation, we recommend pressing overnight for 8-12 hours, to allow the material to fully reset to its original flat and straight shape. 2.? For the Product Appearance (Yellow Tint/Streaks) Problem? Wipe the surface with a soft microfiber cloth and mild neutral detergent to remove shipping streaks. Important Note: Do not use strong acid/alkali detergents, bleach, abrasive sponges or steel wool, which will damage the product's anti-yellowing surface coating and cause permanent discoloration and streaks. 3.?Proper Installation for Long-Lasting Use? Only install the product after it is completely flat. Specification: Package Included: 5 vertical blind replacement slats Material: High-quality PVC polymer Color: White Size: 210cm (82.53") length × 8.9cm (3.5") width Thickness: 0.8mm Notes: Manual measurement, please allow slight errors on size. The color may exist slight differences due to different screen displays. Slats may arrive slightly curled - gently reverse roll before installation. Compatible with most major vertical blind brands.