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Lixit replacement water stopper. For small, medium and large tubes.
Small 5/16", Medium 7/16", and Large 5/8"
Stoppers fit the Lixit glass 16 oz and 32 oz milk bottle style bottles. All stoppers fit the same bottles, the tube size is what is different. No guarantees it will fit any other brand. Lixit stoppers are considered 6-6 ½