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Product QuestionsWhat is a sieve bed and what does it do?Question by: Rick Games on Mar 11, 2017 7:40:00 PMA sieve bed is the filter inside the oxygen concentrator which separates out the nitrogen from the oxygen in the air.Answer by: Shain Gillet (Admin) on Jan 3, 2018 10:17:00 AMAre these priced as per pair?
Do you ship to Philippines?Question by: Jedd Cruz on Jan 22, 2018 6:00:00 PMThese are not priced as a pair on our site. We can ship to countries outside the U.S.Answer by: Shain Gillet (Admin) on Jun 1, 2018 8:11:00 AM