8540            |    Thermionic, cold cathode or photo-cathode valves and tubes (for example, vacuum or vapour or gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray tubes, television camera tubes).
8540.11.00     -- Colour
8540.12.00     -- Monochrome
8540.20.00   - Television camera tubes; image converters and intensifiers; other photo-cathode tubes
8540.40.00    - Data/graphic display tubes, monochrome; data/graphic display tubes, colour, with a phosphor dot screen pitch smaller than 0.4 mm
8540.60.00   - Other cathode-ray tubes
8540.71.00     -- Magnetrons
8540.79.00     -- Other
8540.81.00     -- Receiver or amplifier valves and tubes
8540.89.00     -- Other
8540.91.00     -- Of cathode-ray tubes
8540.99.00     -- Other