RETRACTABLE GAP DUST CLEANING BRUSH SIZE: The Length of the brush handle is adjustable, from 9.1 inches to 41.3 inches, the dust board size is 16.9 inch*2.8 inches, total length can reach 57 inches after installation, so it has a wide cleaning range, and easy to use. HIGH QUALITY MATERIALS: Gap Dust Cleaning Brush with stainless steel retractable handles is strong & Durable, removable and washable microfiber dusters will never lint and can be used year after year! AMAZING CLEANING POWER: Our Hica microfiber duster is expandability, flexibility and flatness, and the Dust Removal Brush handle can be stretched longer as you need, but it's lightweight. So it is not necessary to move the washer & dryer & refrigerator & bed to clean the corners, gaps where dust and garbage are invisible.Because the dust board and the clean cloth cover is long, It is easier than general cleaning cloth to clean large surfaces quickly. MULTIFUNCTIONAL GAP DUST CLEANER: Gap Dust Cleaner can be used to clean the conners & gap hard-to-clean in your daily life, such as the bottom of the bed, the gap between the sofa and floor, the bottom of the wardrobe, and the bottom of other furniture.