This is the T5143 T-Motor Ultralight series prop, a lightweight and responsive tri-blade propeller. With its lightweight design, the prop comes in at only 3.8g. This low weight decreases spool up times, which increases feel and responsiveness. Absolutely perfect for lightweight builds or builds with higher KV motors that can take advantage of the lightweight design.
The standout feature of this propeller is that it sports the new POPO system by Lumenier. You can pop this propeller on any POPO compatible motor and remove the need for prop nuts forever! This doesn't mean you can't use this prop with normal motors, they still work perfectly with normal motors and prop nuts.