What type of connector does this adapter have?

The adapter has an RJ45 Female connector and an RJ45 Male connector.

What is the material of the cable jacket?

The cable jacket is made of PVC - Polyvinyl Chloride.

Yes, this adapter can convert any cable into a rollover cable.

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StarTech.com ROLLOVER Cisco Console Rollover Adapter for RJ45 Ethernet Cable M/F