... trolley etc. 2.Ply rating:2PR,4PR,6PR or 8PR 3.Ball bearing We manufacture full range of rubber wheel for ... ”, 11”, 12”,13”, 14”, 15”, 16”,18”.PU foam wheel 3.25-81.Tyre Pattern:Lug pattern etc.2.Steel rim ... 3.Ball bearing4.Ply rating:2PR,4PR,6PR or 8PR. 5. ...