P30 Nichrome FilamentOptions Order code Description 505115 P30 Nichrome Filament, 3 turns 505116 P30 Nichrome Filament, 4 turns Note P 30 N pullers (serial number lower than P 30 680) came with a P30N filament installed. You can now select either the P30N or P30N 4 filament. With the P30N 4 you can 1) use lower heat settings, 2) pull longer tapers (2 3cm) and 3) use aluminosilicate glass. If you need to pull very short tapers, the P30N is recommended.