KNAUF ECOSTOP 12MM SQUARE: High-quality acoustic ceiling tile, 12mm thick with square edge, designed for optimal sound absorption and durability. KNAUF ECOSTOP 13.5MM ROUND PERFORATED: Premium acoustic panel with 13.5mm thickness and round perforations, ideal for enhancing interior acoustics. KNAUF OLYMPIC MAX STAR TILE 19MM: Decorative ceiling tile with 19mm thickness, offering high sound performance and aesthetic appeal in 1200×600 format.