Parts and Brush Washer has a removable basket inside the glass jar. After you pour in the cleaning solution, place dirty parts in the basket and add the cover. Then tumble gently to wash. Paint brushes may be cleaned by gently scrubbing the brush against the basket. Solids will fall to the bottom of the jar for thorough cleaning action. Jar is 2-1/4 inches diameter x 2-3/4 inches tall.