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Continue to ChatPTFE Stopper (24/25 taper) https://pineresearch.com/shop/products/cells-and-glassware/spare-parts-accessories/ptfe-stopper-2425/
PTFE Stopper (24/25 taper) https://pineresearch.com/shop/products/cells-and-glassware/spare-parts-accessories/ptfe-stopper-2425/