18" cling film core tube wrapped with sisal rope. 3D printed inserts with screw thread inserts glued into the ends. Wheels screw on and fit a large silicone o-ring as a tire. (cat toy)
View standing upright. The three felt pads make it wobble slightly without tipping (by design)
View on it's side, it rolls easily on the o-ring "tires"
View of the "wheel" on the inside. The wheel is just wide enough to cover the start of the sisal wrap (the incomplete "thread" at the end)
View of the outside of the wheel, showing the countersinks
View of the tube inserts, one per side