CrMo 4130 Fully heat treated Height_ 670 mm Width_ 610 mm Weight_ 1060 g only! Outer diamter_ 31,8 mm Slit_ Yes Backsweep_ Yes Pre-installed starnut. You need to run Ethic ICS to use the bars properly. You can run the Deildegast bars with SCS too. In this case you need to cut the slit off or insert a steel shim into the downtube (thus eliminating the function of the slit).