I printed it in silver PLA with 4 perimeters, 0.2 mm / layer, 20% gyroid infill. I used a #10 1-¾ bolt and nut to hold a pair of the parts together.
The author remixed this model.
This remix lengthens the original part by 52 mm and enlarges the end hole just a tad to 10 mm diameter. The PrusaSlicer screenshot shows the original part and the remix side by side for scale. Many thanks to @desertkun_1508198 for his original model.