What does the parameter 6/3+8/1 Gauge STW wire mean?

6/3+8/1 means the wire diameter. Circlecord wire coated with a heavy duty flame retardant, more sturdy

What the detailed parameters of the cord?

50 Amp, max rate 6250 Watt (125V) / 12500 Watt (250V), 14-50P male plug and SS2-50R twist locking female

How to ensure safety during use the cord?

UL listed conform to US standards, High quality pure copper wires provide higher safety

How is the product quality?

High quality pure copper wiring coated with a heavy duty flame retardant, heat resistant, UV resistant, provides protection from rain, wind, snow, soil, and rocks