1" Magnetic Stir Bar

The 1" Magnetic Stir Bar is designed for use with yeast starters and magnetic stir plates in homebrewing and fermentation workflows. Sized for Erlenmeyer flasks ranging from 500 mL to 2000 mL, this stir bar helps maintain continuous liquid agitation during yeast propagation to support oxygen exposure and healthy yeast growth. It is commonly used for beer yeast starters, small batch brewing projects, and fermentation preparation.

Constructed with a smooth PTFE coating, the stir bar is designed for repeated brewing use and easy cleaning. The non-reactive coating helps protect the stir bar during contact with starter wort and fermentation liquids while supporting sanitary brewing practices. Its compact 1-inch design promotes smooth and consistent stirring within smaller yeast starter volumes.

The stir bar is compatible with the Wort Whipper Stir Plate and other standard magnetic stir plate systems used in brewing laboratories and homebrew setups. Continuous stirring helps keep yeast suspended within the starter, improving oxygen circulation and supporting stronger yeast propagation during fermentation preparation.

To use, place the sanitized stir bar inside a compatible flask containing starter wort and position the flask on a magnetic stir plate. Slowly increase stir speed until a stable vortex forms. After use, clean and sanitize thoroughly before storage.

Widely used in homebrewing yeast starter workflows, the 1" Magnetic Stir Bar provides a reusable agitation solution for smaller-capacity flasks, stir plate fermentation setups, and brewing yeast propagation systems.