Nagaoka INS-BR02 insulators. Features ruby and brass construction. Dimensions: Spike 25x23mm, Base 25mmx6mm. Weight: Spike 47g, Base 24g. Load capacity: 200kg per set. Includes 4 pieces. Made in Japan.🇯🇵 - Material: Ruby spheres, Stainless Steel, Brass - Manufacturing Process: Computer-controlled NC machine machining - Assembly Location: Main factory in Yamagata, Japan - Features: Suppresses resonance, increases vibration separation, tightens low frequency range, improves clarity, resolution, and sound image localization in mid and high frequency range - Appearance: Luxurious look with a color-changing ruby material vise. :price negotiable for sincere buyer 😃👍🏾