✔ GREAT BLINDS DUST CLEANER - this window bind brush is a very good helper to be used in office and house, the unique design blades can clean dusts inside of window blinds and air conditioner blind, even car blinds ✔ 4 DIFFERENT COLORS MICROFIBER SLEEVES - blue red green orange, compare to the common cloth, it can work better to clean dust as the sleeve is microfiber that has high water-absorbent, easy wash, strong detergency features ✔ PERFECT RADIAN ABS ARM - this perfect radian arm is designed to suit all the window blinds, and 3 blades can clean 2 blinds tones at the same time ✔ SIZE AND WEIGHT - L 8.00inch * W 0.86inch arm, L 4.00inch * W 1.40inch sleeve, 2.8 oz per set ✔ 100% MONEY-BACK GURANTEE - u can get full payment refund within 6 months if you are not satisfied to our window blind brush