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9mm Screw Caps
![9mm Screw Caps 9mm Screw Caps](https://www.qecusa.com/media/catalog/category/2020-9mmcaps-cover.jpg)
9mm ribbed screw thread caps are made of high quality polypropylene to exact manufacturing tolerances and lined in a controlled manufacturing environment.
Septa materials include natural rubber with ETFE liner, pigment-free or white silicone, with natural or red PTFE liners, all .040” thick.