... 2 fine workmanship of all our products. 3 air free This semi-pneumatic tire 's outer diameter is 153mm,width ... elasticity and antifriction than air tires.and they are of free defence. they are widely used in lawn mover,toy ... technical force,and good after-service,stable product quality,my company is willing to high reputation of high efficiency ... jointly create a better future! 6"*1.5" flat free tire