#5 Solid Bung

#5 Solid Bung

The stoppers are molded. They are BPA-free, made out of Food Grade materials. They provide an air-tight seal to carboys, necessary for proper fermentation.
Each has a perfect consistency as they are all injection molded.

The quality is comparable to silicone stoppers. They stick perfectly to Glass and PET, even when they are wet.

Maximum Temperature: 70 °C (158 °F).