The NiSi Air Blower is a rubber, handheld bulb air blower. When squeezed, air is drawn into its one-way valve on its bottom and forced out of its top nozzle. This pressurized, chemical-free air is suitable for removing dust from sensitive surfaces such as coated optics or camera sensors. The NiSi Air Blower measures 7.5" long and its 2.0" plastic nozzle helps make it effective for areas that are difficult to reach with cleaning tools such as a brush or swab.