NPT-PTFE Blanking Nut Stopper, Used to Seal Unused Blank Neck Ports of PTFE Lids, 0.5″~1.5″ NPTFor Sealing of Unused/Blank Neck Ports of PTFE Reactor Lids, , PTFE 반응조 커버의 Blank Neck용 마개 (SL21CAT00002863)