This AF Sprayduster helps keep your PC and other electrical equipment free of dust and operating coolly and quietly. Ideal for accessing hard to reach places, this sprayduster provides a thorough clean with compressed air. Particularly well suited for removing built-up dust from fans and keyboards, this cleaner will help to improve air flow and prevent overheating. Due to the spray design, the 400ml can should be used upright at all times. But with this promotion, buy 1 400g AF sprayduster and receive a 200ml invertible sprayduster free.