Federal and Tungsten Spark Plugs

[takato]

City

Burlington

State

KY

Price

in ad

I have about a half dozen of Federal and Tungsten spark plugs they are nos I have about 6 of each and would like to sell for five dollars each or make me an offer Federal is marked "7" and the Tungsen is marked 7-S Thanks

 

[Kube]

I have about a half dozen of Federal and Tungsten spark plugs they are nos I have about 6 of each and would like to sell for five dollars each or make me an offer Federal is marked "7" and the Tungsen is marked 7-S Thanks

"ABOUT" a half dozen? Count them please.
What exactly does ABOUT mean? 4? 8? 7? 10?