This two-head retractable computer brush is made of ABS material, combines a soft brush and a hard brush to better clean all parts of the computer. Featuring in one side soft brush is made of natural wool and is used to clean the screen and other places where soft bristles are needed. Another side bristle brush with PP hair silk, which is suitable for cleaning the garbage in the gap of the keyboard and some internal and external facilities that need to use a hard brush. When used, it can be flexibly stretched at both ends according to the need. Great for cell, computers, keyboards, camera, laptop, automobile dashboards clean. QTY for 20,000 pcs and over by the ocean. Please feel free if you are interested in our items or need more assistance.