SUPRA Cables 4.0m tos-tos Digital Cable It wasn't used in an environment where it would be frequently plugged and unplugged, so I don't think there's any looseness in the connections. When removing it, I used caps and masking tape to protect the tips from scratches, so the plugs are also clean. SUPRA ZAC SUPRA Optical Cable Series 4.0m Retail Price: 22,000 yen SUPRA Optical Digital Cable (4.0m, 1 piece) ◆ Supports up to 24bit/192kHz and various high-resolution audio sources ◆ High S/N ratio and high resolution to block external noise ◆ High strength and flexibility are achieved by uniquely polishing the curved resin fiber ◆ ZAC Toslink-4.0