The notation is a price of one F edge child.

The product details
Maker/HIROSE ELECTRIC (HRS)
Series/GT8E
Standard size/-
Non-waterproofing/F
Surface treatment/tin plating
Application electric wire size/20-22AWG (0.3-0.5mm2) electric wire finish outer diameter/1.3-1.5mm

Recommended pressure bonding tool
Size crimps it for a small terminal and recommends work in the pressure bonding environment of the very small size about the processing.
◆Product made in engineer exact pressure bonding pliers /PA-09
◆Product made in engineer exact pressure bonding pliers /PAD-11
◆The exchange dice for the engineer precision pressure bonding pliers PAD
PAD-11S for 0.7-2.2mm
＊(as it is an exchange blade, you cannot use it in the simple substance)