weld-on hubs in type W ,WH .details as follows W12,W16,W20,W25,W30,W35,W40,W45,WH12,WH16,WH20,WH25,WH30,WH35,WH35-2,WH40-1,WH40-2,WH45-1,WH45-2,WH50-1,WH50-2