The surfaces of the bristles have undergone special to discoloration and rusting during use, and will not contaminate the cleaning area, ensuring that the surfaces of tiles, stones, and other materials is as clean as new The circuit board cleaner brush can remove and debris from the keyboard, and perform well in cleaning small gaps such as the motherboard, headphone, and charging port Equipped with two diameter brush heads of 8mm and 15mm, the 8mm brush head is suitable for narrow gaps such as jointing and door and window sealing strips, while the 15mm brush head can efficiently clean wide areas such as skirting boards and floor expansion joints, meeting different gaps cleaning needs ​ The bristles is soft, capable of gently sweeping away light dirt such as and hair, as well as penetrating deeply into crevices to remove stain; More suitable for gaps cleaning of vulnerable materials such as paint, leather,, and more, to avoid the surfaces Clean without dead corners; The bristles is treated with a special dyeing and fixing process, and do not fade during use Even they come into with cleaning agents, they will not contaminate the cleaning surfaces ​