The cooler is not for 18.4 "Notenboks suitable, since I myself own a Acer 8930G, it is much too small. AWAY !!! Just suitable for 17 "notebooks, the description is misleading and the statement by the previous speaker that this super fits well is wrong. He may not fit, because he's way too small flat. I was angry animal maybe when he arrived here, so measure out better next time notebook. Instead of the description to believe that this is suitable to 19 ". For 17 "notebooks super, very robust, since almost everything is made of brushed aluminum, but it is also very noisy even if it is only half turned up on him so loud that you get a headache. At full load, it makes my cleaner konkurenz.Das then called Silent for the deaf or hard of hearing, otherwise I can not explain it.