General description 3M Overspray Guard 400+ is designed to enhance the longevity of the main particulate filter for the 3M Maintenance-Free Reusable Half Mask 4000+ Series. It effectively traps larger spray particles, preventing them from clogging the filters, thus ensuring optimal performance and extended use of the mask. Technical specifications For Use With: 06941 & 06942 Masks MFR Part No.: 7100113104 Package Quantity: 10 Product Type: Overspray Guard Series: 400 Other information