Horizontal door track It is made of 2.0mm galvanized steel.One end is provided with 2 round holes of 7mm diameter, the other end is provided with one slotted and one round hole. The bend has an inner radius of approx. 300mm.2", bended, shortened R= 300 mm. Galvannized steel: Thickness: 1.8mm,2.0mm,2.5mm