Urethane CNC Fingerboard Wheels.
You Must use the washers.
The backing is softer on Urethane Wheels
Here are some of the best urethane wheels on the market, let alone the great price.
Why would you overpay. They are made right here in the USA, and are available in a ranbow of colors.
They measure 7.5mm Diameter x 4.5mm wide.
The backing on Urethane Wheels are softer.
Make sure to use the Fingerboard wheel washers that are provided
Get yours today.