... Province, there are more than 150 workers in our factory, We have advanced production equipment,month output about 200000pcs .2.Our ... roller bearing.3.The material is bearing steel(GCr15),however,we can accept your requirement,for example:stainless steel,carbon steel.4 ... big wooden case.the small bearing put in tube is reasonable.5.We accept small order and processing customized,you just sent blueprint ...