These are replacement parts for the rubber grip ring that is typically found around a gas bbq grill knob.  These have an internal diameter of 53mm and are 2mm thick (not counting the grippy ridges)  You can easily scale this up or down to fit different diameter knobs.  Scale the X,Y,Z as needed to accommodate your own needs.

I needed them as the stock grips had perished in the sun and heat over time for my Landmann grill.

Printed with: Black TPU

Infill: None

Print Orientation: On its side

Measures: 53mm internal diameter, 2mm thick, 18mm high