SCS (formerly 3M) configures filters with thin fibers in two different weaves to trap specific sizes of particles, and designs filter cartridges for easy installation and safe disposal. Type 2 - Toner/Dust Filter The Type 2 filter efficiently traps toner used in standard copiers and laser printers. It is also ideal for cleaning typewriters and data processing equipment. Type 2 is the standard filter type included with all 3M service vacuums.