C4KX-PWR-750AC-R/2 Cisco Showing the single result Sale! Cisco 750W AC FRONT TO BACK COOLING SECOND PWR SUPPLY F/CATALYST 4500-X C4KX-PWR-750AC-R/2 $2,739.56 Original price was: $2,739.56.$1,671.69Current price is: $1,671.69. Add to cart Add to wishlist