LAUCO Disposable cup system works excellent with all types of paints, primers, epoxies, and commercial coatings. Use the cup system with automotive paint basecoats, clearcoats, topcoats and primers, as well as with stains, sealers, gel coats, varnishes, urethanes, enamels, and lacquers. Package Includes: 50 cups liners at 13.5 ounce (400ml) fluid capacity, 50 lids with built-in 190-micron fluid strainers, 20 sealing plugs, and 1 hard cup with 1 retainer ring. The disposable spray gun cup system's outer hard cup connectors are compatible to work with all original styles of 3M PPS series spray gun adapters. Cannot be used with the new 3M PPS 2.0 series spray gun adapters. An adapter is required to use the system with most spray guns (not included). The hard outer cup is reusable and features a retainer ring that helps to secure the liner in place. The lids have built-in 190 micron strainers that help to filter out any paint particles that may be in the paint. The kit also includes 20 cup sealing plugs that can be used to seal up the liners for storage or disposal. This system is designed to save you time and money by eliminating the need for mixing cups, paint cans, and cleaning traditional metal gun cups. The disposable liners and lids can be thrown away after use, reducing cleanup time and waste. Lauco 50 Pack Disposable Spray Gun Paint Cups Liners and Lid System Kit is a convenient and efficient way to mix and apply paint with a spray gun. It is a good choice for both professional painters and DIYers who are looking for a way to save time and money on their painting projects.