With differential roller. Extension approx. 33 mm. Load capacity of 40 kg according to EN 15338, Level 2. Galvanized steel. Minimum panel height for hole row 32 mm: Max. panel height 5 HE (320 mm). Min. panel height 2 HE (128 mm) for wide wall push and hanging registration frames. Min. panel height 2.5 HE (160 mm) for SysTech frame. Notes: Locking rods Stop Control and Stop Control Plus must be ordered separately. Not designed for parallel systems and push to open.