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Continue to ChatPTFE Adapter, 3.5 mm OD to 14/20 Port https://pineresearch.com/shop/products/other-products/ptfe-adapter-3-5mm-to-14-20/
PTFE Adapter, 3.5 mm OD to 14/20 Port https://pineresearch.com/shop/products/other-products/ptfe-adapter-3-5mm-to-14-20/