Robart Foam Inserts For Scale Wheels 3" - 3 1/2" Wheels (FOAM 3)

Robart Foam Inserts For Scale Wheels 3" - 3 1/2" Wheels  (FOAM 4)

• Fits Robart plastic scale wheels and tires for 3"- 3 1/2"aluminum wheels
• Fills the gap between the hub and the interior of the tire to make the tire more rigid
  
• Must for all airplanes weighing over 15 lbs.