... bore diameter : 10.5mm with cover 5.prompt delivery baby carrier wheelModel:422PP Size:108X32mm/4.3X1.2inch bore diameter: 10 ... .5mmHub length:35mmtyre /inner material :plastic Application :Baby Carrier,air commpressor ,platform handtrucks,garden tool carts,hand trollys,trimmers ... ,leaf blowers,barbecue frill ,etccuatomized rubber wheel,sizes,colors and material available upon requests.