3M standard size lids and liners for the 3M PPS™ paint preparation system. Disposable lids come with either a 200m fine or a 125m extra fine filter. Each box includes either 12 lids with filters & 12 liners or 50 lids with filters & 50 liners. 12 pack includes 10 sealing plugs and 50 pack includes 20 sealing plugs which allow you store any excess coatings in the liner for future spraying.