Jf4top 320 grit 280 mm x 100 mm is a very flexible high purity aluminium oxide abrasive material with additional grinding aids in the top coating. JF4top has a great belt life when finishing and polishing of anything from stainless steel to brass. for fine grinding
We particularly recommend JF4top for flexible belt applications (such as the Finitube or Beltit powerfiles) on stainless steel and non-ferrous metals.