It are precision-manufactured for high-resolution Nuclear Magnetic Resonance (NMR) spectroscopy applications. Designed to operate at 500MHz, these tubes ensure accurate and reproducible results in the analysis of organic molecules. Each tube is crafted from high-quality borosilicate glass, providing excellent chemical resistance and durability. The 7-inch length accommodates various sample volumes, and the pack includes five tubes, each equipped with a plastic compression-fit cap and a sandblasted marking spot for easy identification.