Do i need cat7 or cat 8 ethernet cable?

Which is better cat7 or cat8?

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Cat7 Ethernet Cable 1ft 5 Pack Multi Color, BUSOHE CAT-7 Short Flat RJ45 Computer Internet LAN Network Ethernet Patch Cable Cord - 1-Feet

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Need Cat 8 Ethernet Cable, Cat 8 Ethernet Cable Best Buy

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Premium SFTP Cat8 Internet Cable Compatible with Cat7/Cat5/Cat5e/Cat6e US Lot