high polished pin with magnetic fieldspecial double polished & rounded endsavailable in size:pin thickness in mm  x  pin length in mm0.5 x 30.5 x 40.5 x 50.5 x 60.5 x 70.4 x 40.4 x 50.3 x 5 grade : steel 202 grade material,steel 304 grade material,steel 316 grade material.