From Hi Fi Collective:
"High Purity solid OFC, rhodium plated insulated RCA socket, rhodium plated OFC copper fixing ring. Screw fix connection (allen key) or can be soldered, Teflon insulation. 11mm diameter drill hole, can fit 1-5mm thick chassis. Sold in pairs, red & white."
Price is $12 per pair. Cost was $26/pr. 5 pairs available.
