1) Material: Stainless steel 440C , Stainless steel 304 .2) Grade:P0(ABEC-1),P6(ABEC-3),P5(ABEC-5)3) Main products: a) Standard sizes: MR series,604-6009,624-6208,634-6308,684-6808,694-6908, 6010-6030,6210-6230,6310-6330,6403-6416,R2-R24,1601-1657,16001-16020 b) Non-standard sizes: according to your requirements(Your samples or drawings) c) Measure:Inch series and metric series .4) Shield: open ,ZZ ,2RS .5) Package:Standard export packing (Plastic tubes and cartons)