If you’re gonna have a sponge in your kitchen, then this one is the one to have. Copper is known for its microbial properties. The sponge holds the soap and water when cleaning. When ready to disinfect, pop it into the washer machine—may be washed up to 140º F. You’ll get one 2 ¾” x 4 ¼” & one 4” x 5 ½” sponges & instructions. Terrific tool!