The 25-pack paint mixing cups are easily refillable and the disposable caps and liners can be simply discarded at any time, reducing paint material waste and cleaning solvent waste while eliminating the cost and labor of cleaning traditional metal cups , as well as the need for mixing cups and paint cans. 25 caps with built-in 125 Micrometres fluid filter and curved design promote air circulation, ensuring uniform paint output from the , ensuring uniform paint production. The disposable cup system's external hard cup connector is compatible with PRO-33, PRO-44 and PRO-88 HVLP models to meet your different needs. Featuring a thicker outer cup and precise graduations, you can determine mixing ratios for common paint systems, and is transparent for easy viewing of liquid levels. The sealing plug ensures that the paint cup is not prone to leaking during use. This paint cup liner set includes 25 coasters with a liquid capacity of 20 oz (600 ml), 25 lids, 10 cup sealing plugs and 1 hard cup