The Silver Eclipse 10 biwire jumper wires adapt standard 2-terminal speaker cables to speakers with 4-terminal biwired inputs. Grain Optimized OCC-7N silver-clad copper conductors provide serious audiophile sound quality. For the best preservation of delicate musical information, we recommend connecting speaker cables directly to the high frequency terminals and using the jumpers to connect the low frequency terminals. The jumper arrows should also point to the low frequency terminals. Pack of 4 jumpers with Spade lug or Banana plug terminations. These biwire jumpers are six inches (6") in length.