20MM PTFE/SI SEPTUM 1000/PK 20020141 (EA)
https://www.knockoutrat.org/shop/rw2-1030-51483-20mm-ptfe-si-septum-1000-pk-20020141-ea-313141
https://www.knockoutrat.org/web/image/product.template/313141/image_1920?unique=07fba14
This 20MM is guaranteed a 20MM with the use of 20020141 and directly supplied to your lab by Gentaur's warehouse.
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Shipping: 2-3 Business Days