This is a D’Addario - once known as 'Planet Waves' - Classic Series jack-jack speaker cable designed for guitar/bass amps.

D’Addario Classic Series cables deliver undeniable quality with an unbelievable price tag. These cables have pure, oxygen-free copper core conductors with a naturally low-capacitance which transfers a pristine guitar tone, and with 90% spiral shielding they have virtually no handling noise. The jack plugs at each end are designed to be fuss-free and durable. Just plug ’n’ play!