12MM PTFE/SILICON/PTFE SEPTUM 100/PK (EA)
https://www.aciniccell.org/shop/rw2-1030-25122-12mm-ptfe-silicon-ptfe-septum-100-pk-ea-313043
https://www.aciniccell.org/web/image/product.template/313043/image_1920?unique=07fba14
This 12MM is guaranteed a 12MM with the use of (EA) and directly supplied to your lab by Gentaur's warehouse.
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30-day money-back guarantee
Shipping: 2-3 Business Days