What is the 'standard' t track size?

What is the 'standard' t track size? steel t slot track ) Brand: BOSCH Model: 2608638698 T-Slot Track Steel Flat steel t slot plate M6 x 75 mm T-Bolt T-slot bolt M6 x 75 mm Slide nut size 18 x x mm Galvanized steel Compatible with Aweso T-tracks Compatible with Incra T-tracks

steel t slot plate Description Allows clamping from any point on a T-slot track; Consists of an aluminum arm and a steel T-bolt; Tightening knob on screw applies leverage to

steel t slot track Made from solid Aluminium the T-Track 400mm is for installation at a workbench or machine for T-Slot plates Technical Data Material, Aluminium  Steel T-Track Stop Block System Mini Hold-Down Clamp T-Slot Stop Accurate Length Limit Device Woodworking Tool Manufacturer, Runrui Item Weight, ounces