... 3. good quality and extremely competitive price (1) Name: rubber wheel(2) Color: Black ,red, yellow ,green ,gray(3) Bearing: Ball, roller ... , semi-pneumatic, hollow etc.(5) Material of tire: Our rubber wheel has high natural rubber rate, high elasticity, rub resistance, natural ... rubber tire and steel rim make sturdy wheel.(6) Material of rim: Steel or plastic.(7) Use: It ...