3M PPS Series 2.0 Sealing Plugs are designed specifically for the 3M PPS 2.0 Spray Cup System. Sealing plugs fit into PPS Series 2.0 Lids of all sizes, and feature a wide, flat design that creates a stable base for supporting lid and cup assemblies when turned upside down. This lets you keep the lid filters wet, preserving them during temporary sealing and protection of paint and coatings.