user-friendly competitive price small MOQ timely delivery Specificatins of Micro-ringMaterial: cooper, silicon, aluminumDiameter: 3mm, 3.5mm, 4mm, 4.5mm, ... price, fast shipping and less MOQ.Yiwu Bendu Exports & Imports Co., LtdAdd: No3 District of Danxi, Beiyuan Industry Area, Yiwu, ChinaWebsite ... contact us. We will answer you within 24 hours. copper micro ring