Spitfires latest collab with everyones favorite traveling film crew from across the pond, Atlantic Drift. The Sapphires are a soft and fast 90 Duro clear riding surface bonded to 101 Duro Formula Four inner colored cores. Coming in the Radial Shape; A round edge, medium width riding surface shape. Offers the versatility of the Classic shape and the width of a conical. 56mm x 35mm, with a 21.5mm riding surface, 90A hardness.