https://www.sg-connectors.com/honour/sg-r-001.html
The
high-quality RCA plug has a metal connector body, which is ideal
for professional installers or home theater enthusiasts who want
to make their own customized length of high-quality RCA
cable.
The RCA plug
connector uses a 24K gold-plated structure to reduce rust and
provide you with the cleanest audio experience.
High-quality
and made of environmentally friendly materials, it can be used
with RG6, or multi-strand cables must be welded.
48#Ruifeng road, Dongjiao economic zone,Fenghua district, Ningbo city, Zhejiang province, China.