... . Material: Galvanized Light Steel2. Stud size (CM):50*50mm, 50*35mm, 70*34.5*32mm, 75*35mm, 75*50mm, 100*50mm, 100* 35mm ... . Track size (UM):50*40mm, 50*25mm, 72*25mm, 75*25mm, 75*40mm, 100*40mm, 100*25mm or as your request4. UD28 ... ,0.35mm,0.40mm,0.45mm,0.50mm,0.60mm,0.7mm,0.8mm or as your requestWe also can customize the speicification as your request SGS Light Steel Keel ...