Acupuncture Needle Seirin B 15mm x 0.20mm Blue Box 100Acupuncture needle which has been ground to diamond sharpness and polished three times for gentle and easy insertion. Made of stainless steel wire. Box of 100. Blue: . 20mm x 15mm Brown: . 30mm x 30mm Violet: . 25mm x 40mm Ergonomically designed grip for safe and convenient use Lightweight, environmentally friendly polypropylene plastic grip that is kind to the skin Micro thin silicone coating for easy and gentle insertion Ethylene Oxide sterilized