Special accessory for the 4000 series masks, helping protect the filters from particles. The Overspray Guard 400 Pre-Filter is available to help extend the life of the main particle filter for maintenance-free 3M 4000 masks. Suitable for all masks in the 3M 4000 series, such as models 4251, 4255, 4277, etc.
- Extends the life of the mask
- Keeps the filters clean
- Traps larger spray particles before they reach and clog the filters