The Grefet CS40 Casement Series is a smart and cost-effective solution developed for high-rise and mass housing projects. Compared to the CS50 series, CS40 offers a more economical profile design without compromising durability and performance. It supports glass options from 5mm to 24mm, making it suitable for a wide range of residential and commercial applications. The system comes with both single locking and multi-point locking options, allowing flexibility based on project requirements and budget. Designed for efficient fabrication and fast installation, the CS40 series is an ideal choice for large-scale projects seeking modern aesthetics, reliable performance, and optimized project costs.