The KESTER part 63-0097-2331 is a high-quality soldering flux that offers excellent performance and reliability. This water-soluble flux is specifically designed for use in professional soldering applications. The 2331-ZX flux is classified as ORH1, ensuring it meets industry standards and requirements. It comes in a convenient 1-gallon size, providing ample supply for your soldering needs. Please note that this particular product is specifically designed for use outside of Europe.