caster wheel zinc plated finish to resist bruise,corrosion and dent. suggest use for garden carts,medical equipments,industrial,hand truck,machinery parts. Item numberwheel diameter(mm)wheel width(mm)overall height(mm)mounting size(mm)bolt size(mm)capacity(kgs)N380075DB753210273*4510*8.580N380100DB1003212973*4510*8.5100N380125DB12510016073*4510*8.5120