Sia 4819 Zirconia Sanding disc Home / Abrasives and Cutting tools / Abrasive discs / Linishing (sanding) discs, Roloc style quick change discs. / Zirconia Sanding Discs 100mm up to 180 mm / Sia 4819 Zirconia Sanding disc 4" 100mm SIA 4819 Zirconia Sanding discs PK50 4 1/2" 115mm SIA 4819 Zirconia Sanding discs PK50 5" 125mm SIA 4819 Zirconia sanding disc PK50 7" 180mm SIA 4819 Zirconia sanding disc pk 50 Sort By