For both dry and wet use. Safe to use on hardwood, laminate, tiles and concrete surfaces, scratch free. Heavy duty. Designed for home, industrial and commercial mopping. Extra thick tufted, 100% cotton provides added durability for dry or wet mopping larger areas. Mop head has quick-dry blue top with reinforced binding around keyhole opening for added protection against raveling or fraying. Universal size for 24" dust mop frame We ship same day (within working days). 24" Industrial Cotton Dust Mop Head Refill, Dry and Wet, Thick Tufted Replacement Head For Industrial Home Commercial Use Universal size: 24" x 5.5", fit all standard 24" mop frames. 3" long threads, save time and effort with extra large floor coverage.