Natural stones are cut with high precision in a domestic jewelry workshop. Each natural stone insulator is painstakingly mirror-polished by hand by a gemstone craftsman. A small, easy-to-use coin-sized insulator that is compatible with INS-CF/INS-SP/INS-US. Not only can it be used alone, but you can also insert it into the multi-bass insulator "INS-BS" to enjoy even more tuning possibilities. Not only can it be used as an insulator, but it can also be used as a tuning tip by placing it on or sticking it to equipment. Please handle with care as it may break if subjected to strong impact or pinpoint load. Enjoy the texture of natural stones, each with its own unique pattern and color. ■Features is a natural stone insulator made from highly precisely cut black diamond (hematite), with a beautiful metallic black luster. Its physical properties include a Mohs hardness of 6, a specific gravity of 5, and a trigonal crystal structure made of Fe2O3, giving it both high strength and high density. The tone is clear and straight. It is full of powerful core power, yet without any noticeable peaks or dips. It is a monitor-like masterpiece worthy of high-fidelity reproduction. <INS-BD> is made from carefully selected natural stones, and is painstakingly carved one by one by gemstone artisans in a Japanese jewelry workshop.The surface is mirror-polished to give it a beautiful luster and a high degree of flatness. The coin size (φ20, H6) is the same as the INS-CF/INS-SP/INS-US, and can be inserted into the INS-BS. By combining it with other INS series instruments, you can enjoy even more tuning possibilities. ■Product specifications Material: Black diamond (hematite) Dimensions: 20mm diameter, 6mm height (round) Mass: 9.3g (1 piece) Mohs hardness: 6 Packing quantity: 4 pieces per set Load capacity: 200kg/piece Release Notes: INS-DB/INS-SQ