Graduated marks every 5 degree, the long one in the middle is 45 degrees. Works good with both vertical and horizontal bandsaws. And if you don't have a bandsaw it can be used with a permanent marker and cut with a angle grinder. Not recommended to cut it with a grinder when the elbow is in the fixture. If you don't find the fixture for your elbows send me a massage with your elbow diameter and bending radius and I made a drawing fore you. M6 insex bolts and M6 brass heat inserts Recommended print parameters: Material :PLA Nozzle diameter 0,6mm Layer height: 0.25 Infill: 20% Top/bottom layer: 3