I wanted to make a grommet to nicely match the contour of a 44.45mm (1.75"} round pipe to run a cable through it. This is specifically to install a light bar and hide the wires on a Hooke bumper for an '08 JK Jeep Wrangler ( https://www.amazon.com/gp/product/B07C1MXYRX ).

I made a couple of options as i wasn't sure which one i would use at the time i designed these.

They come in 2 sizes. Listed below are the outer diameter of the drilled hole, and inner diameter of the space you have to feed your wire through with.

20mm Outer Diameter (Approx 13/16") and 15.88mm Inner Diameter (exactly 5/8")
12.7mm Outer Diameter (Exactly 1/2") and 12.7mm Inner Diameter (Exactly 3/8")

Then prior to posting this thing, i added a couple more pipe diameters in standard/imperial units.

Gromet 1 = 25.4mm
Gromet 1.5 = 38.1mm
Gromet 1.75 = 44.45mm
Gromet 2 = 50.8mm

Anycubic

Photon

No

No

.05 mm

100%