The Hakko Diaphragm Kits are a replacement kit for the Hakko/Matala Air Pumps. If your pump is working yet not pushing any air out it is most likely that your diaphragm needs to be replaced. If your diaphragms are blowing out often they you might have to much back pressure and will need to check your airstones for calcium buildup.
- 4 pieces in set
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