| Wire: | | |
 | | High Grade: Insulated copper wire that contains a minimum of 75% copper versus insulation |
 | | Med Grade: Insulate copper wire that has a minimum of 50% copper versus insulation |
 | | Low Grade: Insulated copper wire anything less than 50 % copper versus insulation, such as extension cords, speaker wire, phone line etc. |
| Copper: | | |
 | | Bright and Shiny: copper that has been stripped of all insulation, must be thicker than a pencil lead and contain no paint, solder or oxidation. |
 | | Copper #1/pipe: Copper Pipe That Is Clean of Any Paint, Solder and Oxidation. |
 | | Copper #2 Copper Wire (smaller than a pencil lead) or pipe that contains solder or oxidation etc. |
| Aluminum - Aluminum comes any many forms, the most common grades are: |
 | | Sheet aluminum: thin, light weight aluminum such as siding, gutters etc |
 | | Extrusion: Molded aluminum such as window framing, screen doors etc. |
 | | Cast: a heavier quality aluminum that you find more in automotive parts and or kitchen pots and pans. Cast can with hold more heat than other aluminum. |
