What type of connectors do the cables have?

The cables have RJ45 connectors on both ends.

What is the length of each CAT6 cable in the pack?

Each CAT6 cable in the pack is 6 ft. long.

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StarTech.com 6 ft. CAT6 Cable 10 Pack - Blue CAT6 Patch Cord - Molded RJ45 Connectors - 24 AWG - Ethernet - ETL Verified (C6PATCH6BL10PK)

6 ft. CAT6 cable pack meets all Category 6 patch cable specifications to deliver a reliable connection
CAT 6 cable features 100% copper and foil-shielded twisted-pair wiring to prevent EMI interference
Molded connectors on the CAT 6 network cable protect the RJ45 clips during installations
CAT6 connectors cable is built with 24 AWG copper wire and is tested to keep Near-End Crosstalk within acceptable limits