Universal rail system. Distance between rail end and first hole is always equal. Continuous graduated centimeter scale on one side. Inward formed flanges with serrated profile for extra grip. Material: stainless steel 1.4404 (AISI 316L) tested for fire safety. for more information about the max. allowed load (Fa,z) please refer to the loading tables or our online datasheet ‘Technical Details BIS RapidStrut®'.