"BOX OF 30 ENVELOPE PACKS; EACH PACK CONTAINS 1 SHEET EACH OF IX50 AND IX100 FILM; COMBINATION PACKAGE OF LOW SPEED, ULTRAFINE GRAIN, HIGH CONTRAST, ASTM CLASS 1 FILM WITH MEDIUM TO FAST SPEED, VERY FINE GRAIN, HIGH CONTRAST ASTM CLASS II FILM; PROVIDES NON-DESTRUCTIVE INSPECTION BY RADIOGRAPHIC EXPOSURE OF LIGHT METALS AND ALLOYS AND THICKER SPECIMENS REQUIRING VERY FINE DETAIL"