Summary

PRODUCT IS IN INCHES
Import into 3d printing software in inches
The hole is designed to be a tight for 1 inch pvc piping. The hole might need to be sanded down after printing to fit the pipe depending on your printer.
My setting are as follows
Pritrbot Simple metal kit
Layer height - .35mm
Solid Layers - 2
Infil - 7% rectilinear
Temp - 185