factorduty 4 pack 6" inch swivel pneumatic air caster wheels, knobby tread tire, swivel industrial, heavy duty, farm cart lawn & garden wheels 4 pack - swivel is up for auction in Patio, Lawn & Garden. The current bid is $4.50, 94% below the $79.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.