Test play for about 5 minutes or less. If you are interested, how about taking this opportunity? We are looking forward to hearing from you. ■ Specs / From the manufacturer's website These screws are the result of testing multiple platings at multiple plating factories on the most resonant and wide-range screws available, ensuring stable supply. Made in Japan, plated in Japan, and entirely domestic. You can get an effect as if the grade of the wood itself has improved. First, without turning on the amp, compare the sound carefully with the natural sound. Specifications of this product ・Screw diameter: 3.5mm ・Screw length: 25mm ・Threads per inch: 18 threads per 25.4mm ・Quantity: 5 pieces