Elemental Niobium 1 specimen (Nb) (coin size, inch)

---------------------------------------------------------------------- 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ---------------------------------------------------------------------- [Product Overview] This is a coin-shaped specimen with a purity of 99.9%, a diameter of approximately 25mm, and a thickness of 2mm (the size of a 500 yen coin). [Identification] (Front) [Atomic number, element symbol, English name, number of electrons], (Back) [Purity, electron orbital, atomic weight] [Appearance and Features] It has a slightly dark, silvery-white metallic sheen. [Storage and Handling] It is relatively stable in air and hardly corrodes. Over time, it may discolor or become dull, but it can be cleaned by soaking it in a citric acid solution. These are elemental specimens for collection, educational purposes, and ornamental purposes. Please note that we cannot guarantee their quality for industrial or manufacturing use. There may be slight variations in the appearance of each product. We inspect each item individually and only sell products that are in good condition. However, if you are not satisfied for any reason, we would appreciate it if you would return the item. We will handle the return in accordance with Amazon's return policy.