Insulated Female Bullet Terminals

Red -  4mm (5/32")

Blue - 5mm (3/16")

Yellow- 5mm (3/16")

Wire Size Guide 

Red -  3mm 

Blue - 4mm 

Yellow- 5mm,  6mm, 8 B&S 

MM – is an industry term that identifies cable size and is not CONDUCTOR CROSS SECTION AREA