Here we have a 100% genuine Marshall Speaker cable.
This is the cable that you get with many new Marshall speaker cabinets.

Despite it looking like a “guitar lead” it’s not a standard guitar type cable. This is for connecting your amp head to a speaker cabinet.
1.5m / 5ft long approx
Standard size 6.35mm / 1/4inch jack plugs on either end.
Black
Fairly Heavy duty

NOT SUITABLE FOR USE AS A GUITAR LEAD
This is because it does not have any shielding so it will be ‘noisy’ if used as a guitar cable. These cables are built for handing (relatively) high power not delicate audio levels.