... stainless steel flat ring gasket 1.high accuracy 2.OEM offered 3.longer service life 4.quick delivery and low price always stainless steel flat ring ... gasket part namematerialdimension(mm)standardflat ring gasketstainless steelOD 250 ID171 ... capability:cast iron ,ductile iron,carbon steel ,alloy steel, ordinary steel ,aluminum ,brass and its alloy materials ...