Black and decker x31522 perforated sanding sheets (5) 120grit This white aluminium oxide quality is suitable for most sanding application, including wood, paint and varnish, plastics, plaster and light metal sanding. Application - specific products, such as wet and dry paper and stearate coated paper ( for reduced clogging) are also part of this range and are clearly marked on the packs. Frit 120 Pack Five. Perforated Size. 93 x 230mm Third Sheet Aluminium Oxide.