Terahertz Pencil-Type Mini Sticks Set of 2 Approximately 62.7mm～62.8mm Approximately 14.5g The grip has a gentle, rounded hexagon shape, making it easy to adjust the subtle pressure. 【Terahertz】 Terahertz ore is a mineral artificially created by melting quartz at high temperatures and collecting silicon. The one trillion vibrations per second (terahertz waves) emitted by terahertz ore penetrate various substances such as wood and plastic. Also, because of its high thermal conductivity, when applied to ice, the vibrations plus heat conduction from the hand cause the ice to melt quickly. It is said to have effects such as promoting blood flow and enhancing natural healing ability, and is widely used in medical and industrial fields. It is attracting attention for its positive effects on beauty and health, such as activating cells, improving blood flow, and firming the skin.