It makes the capacitor has a good self-healing. Thickness uniformity, good wind ability. Capacitor Polypropylene film for type M-PP/S PP: 4, 5, 6, 7, 8, 9, 10, 12micron Detailed Description :Capacitor Polypropylene film for type M-PP/S-PP 1)M-PP Mainly for metallized-film capacitor. 2)S-PP Mainly for foil-film capacitor.