Heiniger Clipper blade set - 31F-15

Heiniger Clipper blade set 31F-15

This is the blade set for the 240v, 12v, 7.2v cordless, Progress and Delta 3 clipper.  31-15 refers to the number of teeth on the bottom and top blades (in this case 31 teeth lower blade, 15 teeth upper blade).  The blade number is normally etched into the base of the blade (see picture).

Note that the new Heiniger blade design is not flat (as pictured) but has a 'kink' in it to help clearance. 

The 'F' suffix means 'Fine' - the blade is shallower than the standard 31 blade.

The standard 31-15 blade set leaves hair length at around 1.5mm.