ISO 525:2013 is applicable to bonded abrasive products (e.g. grinding wheels, segments, sticks and stones) in general, excluding superabrasive products and coated abrasive products.
ISO 525:2013 specifies:

the ISO type number and shape,
dimensional symbols,
standard profiles,
requirements for dimensions, limit deviations and tolerances as well as permissible unbalance,
the specification mark,
the marking requirements.