BrewBuilt CoolStix Stopper for Fermonster & PET Carboys

• Ideal for use with BrewBuilt CoolStix for Carboys • Three holes designed for 1/2' CoolStix, airlock, and thermowell • Compatible with Fermonsters and Plastic PET Carboys! This #10 3 - hole silicone stopper is a must - have for your brewing setup. The holes measure 0.500', 0.413', & 0.375'. It fits all sizes of Fermonsters, but we recommend using the 1/2' CoolStix only with 3 & 6 gallon sizes due to dimensional and cooling power limitations.

This BrewBuilt CoolStix Stopper is great for home brewers who use Fermonster or PET Carboys. It's used when you're brewing beer to help with the fermentation process. The stopper has three holes, one for a 1/2' CoolStix, an airlock, and a thermowell. The hole sizes are 0.500', 0.413', and 0.375'. It fits all Fermonster sizes, but the 1/2' CoolStix is best for 3 - 6 gallon carboys.