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Supplying pre-blended negative paste expanders to the lead-acid battery industry for over 60 years, Hammond Expanders continues to lead the industry in the development of new formulations for the world's growing battery needs. From major corporations to small family owned businesses, organizations of all sizes have come to rely on our ability to provide them with quality pre-blended and custom packaged expanders. Precisely weighed disposable bags provide the ability to add material on a "bag per batch" basis, allowing cleanliness, convenience and reduced overhead.