Philip Harris Resistance Substitution Box

This resistance substitution box has 12 different values:

• 100W,
• 220W,
• 470W,
• 1KW,
• 2.2KW,
• 4.7KW,
• 10KW,
• 22KW,
• 47KW
• 100KW,
• 220KW,
• 470KW.

All values are in + 1% tolerance and all the resistances are of 1 watt rating.