Measure the height and width of your panel door.
Compare your measurements to the information above.
E.g. If your door is 2300mm high and 4500 wide - you would order the 36p springs.
Our Sectional Panel Door Torsion Springs are of the highest quality. When installed correctly and regularly lubricated they will last for many years. They are a high cycle spring which is perfectly suited to the high use they get from Australian families.