The HQ stands for high quality. By far these are the most popular and widely used standard props in the game. Fantastic all around freestyle and race prop. Light, efficient, balanced, and will work with all types of motors and setups.
These props deliver a quick response and good thrust without sacrificing your battery. They hold well in the corners and give you the speed when passing the other guys in the straights.
Flown a buncha props over the past year. The 4.3 are my current favorites.
Quick delivery and excellent quality of the products made me be part of this team! Thank you newbeedrone!