Puritan Filter - Carbon Core [4x1]Carbon Core Cartridge Rely on The Puritan Carbon Core Cartridge for the Clean Solvent Performance you need. The PURITAN Carbon Core cartridge is designed and built to trap more dirt than any other standard size cartridge. The inner core contains only high quality activated carbon that is vibratically filled to capacity for more efficient and effective dye absorption. The unique balance of the finest materials and construction means the PURITAN Carbon