The Sommer Elephant 440 is a four-core copper star-configuration speaker cable that works well in P.A. or hi-fi applications. Each core cable is 4mm in diameter, and it will just about fit in 4mm Banana plugs without trimming any cable strands.
The outer jacket is thick and strong and will withstand quite a bit of wear and tear.
Sound quality is good, not quite as good as some more expensive Hi-Fi cables of the same construction, but for a copper cable it is certainly better than much of the competition at this price. I have been using it for Hi-fi applications for some 2-3 years now, so I have had time to properly test it against other cables, and for bi-wiring/bi-amping, it is certainly a good choice if you cannot afford to pay half as much again for the next step up.
I would recommend this cable.