K Type Thermocouple Wire

What gauge wire is the JPI Type K wire and is it stranded or solid wire?
This a 2 conductor solid core 24 gauge wire.

Is this extension or thermocouple grade wire? Regarding JPI Type K wire
It could be considered both technically. It is thermocouple grade wire. It is just the wire itself, not a probe. This wire could be used as an extension or a lead.

Which one is it, stranded or solid? Both are mentioned in different questions.
This wire is an outer jacket with two solid core insulated wires inside.

What material is the insulation? For example, glass, polyvinyl or some other material
The insulation is neoflon.