it's a 25 AWG Single Strand Wire. This is a tinned copper wire which have rated Temperature: -60°C~+200°C . This is a super flexible wire which very easy to turn and in the outer used pure silicon material. 
- Single Strand Wire: 4 Types (5 meters each)
 
- Rated Temperature: -60°C~+200°C
 
- Conductor: Tinned Copper
 
- Conductor construction: 11/0.08
 
- Insulation: Silicone Rubber
 
- Super flexible
 
- Wire Gauze: 25
 
- High strand count
 
- Pure silicone outer.
 
- Connectors | Wires