World Precision Instruments P30 Nichrome Filament, 3 Turns

World Precision Instruments - Options 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. - WPI (Additional S&H Or Hazmat Fees May Apply)