3M™ PPS™ Lid & Liner Kits contain 25 disposable lids (Large size) or 50 disposable lids (all other sizes) with welded-in filters to strain paint material while spraying, along with corresponding liners and sealing plugs for use with the 3M™ PPS™ (Legacy) paint preparation system. Kits are available in five sizes for a range of jobs large and small.