Chain guide/tensioner, currently installed and working on a mountain bike with a 1x9 gear setup. Easily attached, adjusted and installed with cable ties.
Printed on a RepRap Huxley using 1.75mm Sainsmart Red ABS.
layer height - 0.3mm
Number of perimeters - 1
Number top and bottom Layers - 2
Infill - 30%
Cooling on final layers.