Top Line XL is a specialist for particularly heavy timber or aluminium frame sliding doors, which is especially suitable for the bedroom area. It features a 2-lane top-running sliding door system with a 2-track design. Damping in both the closing and opening directions, as well as collision damping, is optionally available. The leaf weight can reach up to 80 kg, with a leaf height of up to 3000 mm. The sash width ranges from 600 to 1000 mm (with optional opening damping: 1000 to 2000 mm) and a sash thickness of 22 to 30 mm. Height adjustment is possible within +/- 3 mm, allowing for adjustability of sash height, door support, and closing force. The system enables simplified opening due to reduced opening force and allows for quick assembly of the guide parts. The wood thickness can be from 22 mm to 30 mm, with a maximum sash height of 3000 mm and a load capacity of 80 kg. The brand is Hettich, designed for overhead use, made of aluminium, and has a silver anodised surface. The maximum sash width is 1000 mm, and it can accommodate up to 4 doors with an exterior front design.