1.YFB Stud type track rollers 2.ISO 9000/9001/9004/19011: 2000 3.Short delivery time 4.Material-Bearing steel 5.Free Samples Stud type track rollers:1.With methic size 2.Featuring multiple compact structure 3.High rotating accuracy Old No.KR-52-PPCrowned O.D. NUKR..Dimensions (metric)d20D52B24L66I40.5GM20x1.5Approx.Wgt. lbs1.020InterchangeFAGNUKR52CFAG (Old No.)NUKD52IKONUCF 20 ...