For cable: relatively thin, but for the 250 Watt my Beamer attracts probably perfectly adequate. I guess 3x 1,5er cable cross-section. The cable is very flexible because it does not consist of pure copper lines but of many small copper wires, as with speaker cables also common. Since there is also determined a technical term for.
Through the white color of the cable, it stands out not negative on white walls or ceilings.