Andis CeramicEdge Size 4FT Blade leaves a 9.5mm coat length* This is an FT (Fine Tooth) blade. 
Unlike traditional A5 blades that have fewer teeth, Fine Tooth Ceramic Blades boast a higher tooth count, resulting in a smoother and more precise cut. The 4FT Blade comes with 24 upper teeth and 17 lower teeth.
Andis CeramicEdge blades come with 1 ceramic cutter blade & 1 steel blade. CeramicEdge cutting blades run up to 75% cooler and stay sharper up to 5 x longer than steel cutter blades.

This is a detachable, A5 style, fine tooth (FT) blade. 

Finish Cut: Longer blades come in 3 teeth types:
FC or F which both stand for Finish Cut,
FT which stands for fine tooth, or
ST which means Skip Tooth.

Shorter blades come in FC or FT. Unless experienced using ST blades, use FC. For a smoother finish, use FT

A5 style: A5 blades are standard fit blades for use with all brands of A5 model clippers, including Andis, Wahl, Heiniger, Oster & more.