The Pro-Ject Connect it LS S Y-Part is a replacement cable trouser for the Pro-Ject Connect it LS S speaker cable: the Y-shaped part fitted at the point where the cable divides into its two plug legs. It is supplied as a single piece, so order one for each split you need to replace.
The Connect it LS S is one of Pro-Ject's solid core speaker cables, built from four 0.75mm² high-purity oxygen free copper conductors, terminated with 4mm gold plated banana plugs. This Y-Part is listed for the Connect it LS S; check the cable model you have before ordering.