Akasa ak 190 bl ultra quiet fan 8cm emperor blue akasa ak 195 bl this ultra quiet sleeve bearing 8cm fan from akasa features emperor blue fan wheels within a clear casing and acts as a silent blower providing required air flow at a very soft noise development of just 20dba caters for casing of a huge 139cm thus you can attachmount it selectively in gaps of 13 135 or 14cm akasa ak 195 bl ultra quiet fan 14cm emperor blue