The J-15's shorter needle length (15mm), guide tubes, and thinner gauges (02, 01, 1) were inspired by specific needs of top facial rejuvenation practitioners. SEIRIN's precision patented tip design and stringent quality control guidelines make the J-15 perfect for facial acupuncture, as well as auricular therapy, hand therapy, or for use anywhere shallow needling is performed. The J-15 also boasts new ProPak technology, which allows automated manufacturing process, these versatile needles are triple polished, buffed perfectly smooth and electrolytically cleaned. The result is the finest, smoothest, safest and most advanced 15mm acupuncture needle in the world.