These are nice rubber wheels / rollers for your robot / gizmo project.
They are a pliable, yet firm rubber with a nice "tack" to them.
Dimensions:
Inside Diameter: 9.5mm (0.32 inch)
Outside Diameter: 20mm (0.68 inch)
Length: 20mm (0.68 inch)
Item weight is 0.02 pound.
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