The Reynaers SL 38 is a slimline aluminium window system offered by Open Space Aluminium, designed to deliver maximum natural light and a refined, modern appearance. With its ultra-slim profiles, durable aluminium construction, and excellent thermal performance, it is ideal for contemporary architectural projects seeking a clean and elegant aesthetic. https://openspacealuminium.co.uk/products/reynaers-sl38-slimline-aluminium-casement-windows/