Marked every 6" or 150mm with a line, thickness in thousandths
of an inch or in hundredths of a mm (exception 666-1/2)

This handy product includes 667 Series thickness stock, housed in
convenient rewindable dispenser rolls. Having the thickness stock in a
case makes it very useful for cutting off the required length for adjusting
tappets, spark plugs, distributor points, checking bearing clearances and
gear play, fitting pistons, rings and pins, gaging narrow slots, etc. This
stock is also useful for shimming in fixturing and die work.

• The Starrett 666 Series Thickness Gauge or Feeler Stock, Model 666-1 1-2 comes in a plastic dispenser case and is 25' long . This handy product Series is housed in a convenient rewindable dispenser roll. Having the thickness stock in a case makes it very useful for cutting off the required length for adjusting tappets, spark plugs, distributor points, checking bearing clearances and gear play, fitting pistons, rings and pins, gaging narrow slots, etc.
• This stock is also useful for shimming in fixturing and die work.