Shenzhen sihaming technology Co., Ltd. Our company is specialized in the research and development/production and sales of SMA and RF coaxial connectors. Our company's self-developed products have obtained a number of patents, private brand: Sh-link. All the products are made of pure copper, the quality is safe and reliable, and the performance is good. Our products have been produced to the United States/Japan and other countries, if you need to contact me, I will provide you with the product drawings and specifications.