Thermaltake Sleeved Cable Kit

These are extension cables, meaning they plug into your existing power supply cables rather than directly into the unit itself. Because they are universal extensions, they will work with virtually any standard ATX power supply.

While the cables themselves don't generate cooling, their flexible design makes cable management significantly easier. By reducing bulk and clutter behind your motherboard tray, you can improve overall airflow inside your chassis.

Yes, the kit is quite comprehensive. It includes one 20+4Pin, two 4+4Pin CPU cables, and four 6+2pin PCI-E cables, which is sufficient for most modern builds, including those with multiple graphics cards.

The black heat-shrinks are there to secure the sleeving to the connector housing. They provide a clean, professional finish and ensure the individual wires remain stable and protected under high current loads.

The individually sleeved design is generally more flexible than standard, flat ribbon cables found on many stock power supplies. This makes them easier to route through tight spaces and grommets in your case.