New Products: Super Silent Plug Cable, No noise. no electricity. buzz. duzz. high cost pertomance. Reed switch is hermetlcally sealed inside the sleeve. wthe plug circuit is broken before the plug is completely inserted into the socket, there will be no ear-pierching noise when inserted into the ampliffier, sleeve is made of 62# brass with thickness of 0.3mm-0.45mm. more durable and abrasion resistant. The screw thread is manufactured with numerical control machine, making the connection perfect fit and seamless. plated with peral Nicel. the appearance is more shiny and abrasion resistant.