Feature(may vary by option.)

●Drilled to accept airlock or tubing.
●Top diameter: 50mm, 1.97 inches. Bottom diameter: 42mm, 1.65 inches

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Description

It is a size 10 rubber stopper. Product Dimensions ‏ : ‎ 2.01 x 2.01 x 0.98 inches. Manufacturer: Home Brew Stuff.