Usage Tips:QUALITY MATERIAL: The universal brush is made of a connection of the most suitable for this stuff: plastic is used to firmly attach the nylon brushes and wiping microfiber. No matter how many times you use it, the auto detailing brush does not fade and leaves any bristles laying around. BRUSH SIZE: The car cleaner brush with the size of 6.5 IN long and 1.57 IN wide can get into all the little cracks, the nooks, the lug nuts, or tight space. The brush design helps to reach deep into the vent finds of an air conditioner to pick up dust easier and quicker. HANDY DESIGN: The plastic handle prevents scratching paint or polish surfaces if you accidentally hit the car. It is ergonomically designed so you won't feel tired after long hours of work. The towel cloth cover is easily removed for washing. EASY TO OPERATE: The double-ended design of the brush deals with various places that are hard to reach and quickly clean both sides of any size window blind. The bristles are soft enough to protect the surface you're working on but tough enough to take off all the stubborn dirt. WIDE USED: The tool is a great cleaning accessory for air conditioner, keyboard, fan, blind window. The nylon bristles clean very well the delicate parts and vehicle interiors. The brush can also be used for cleaning upholstery, seats, cockpit, shoes, furniture, canvas, bags, handbags, and dog grooming.