The best replacement for 6 cable is cat 5.

The best alternatives to 6 cable are rated as following:
★★★★★  cat 5
★★★  cat 5e
★★  cat5
★★  sata 3
★★  cat 5 cable
★  cat 5e cable
★  rg 59
★  category 5 cable
  sata 3 cable
  cat 6a

Your alternative for 6 cable is not listed? Suggest!
Speaking about 6 cable, one probably shouldn't forget about cat 5e jack.

Other search terms related to 6 cable and their ratings are:
★★★★★ cat 5e jack
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6 cable
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