The BWF International Series is a level four tournament of badminton tournaments along with International Challenge and Future Series, sanctioned by Badminton World Federation (BWF) since 2007.
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Prize money
An International Series tournament offers minimum prize money of US$ 5000.
World Ranking points
The BWF International Series offers fourth only to BWF tournaments (after BWF events, Super Series, Grand Prix Gold and Grand Prix and International Challenge), according to the World Ranking system.
References
BWF International Series Wikipedia(Text) CC BY-SA