Maximum Door Height: 2400 mm Minimum Door Thickness: 16 mm features: The door straightening system adds rigidity to wooden sliding or hinged doors and prevents warping in either direction Ideal for large, heavy, sliding or hinged doors Can also straighten doors which have become warped over a period of time. Normally two straightening fittings are recommended per door panel The door is aligned by adjusting the door tensioners with an open ended SW10 wrench 1 set comprises; 2 x Tensioners, bright zinc alloy 2 x Hexagonal nuts with 2 U washers each 1 x Threaded rod, 1930 or 2205 mm long, bright steel 1 x Trim strip, 1860 or 2135 mm long, black plastic 2 x Cover caps for tensioners, black plastic 4 x retaining plates, black plastic