LS400 is a strong system aluminium sliding window door system designed for large openings and heavy glass applications. Made from high-quality 6063-T6 alloy, it can accommodate heavy sash weights (up to 400 kg) whilst allowing smooth and controlled sliding. The 25mm interlock with the multi-point locking makes it stronger and secure. LS400 suits 2 and 3 track solutions with glazing from 18-38 mm, ideal for aluminium windows and doors within residential and commercial applications. It is a performance sliding system in aluminium tested for air, water and wind resistance.