My Comments on these props.
Balance is good but not perfect. Nice thing i noticed about these are the high efficacy at hover (9 amps Mini T Copter). these are great for flying around on 3 cell packs.
Inner diameter: (Prop Mount) 5mm
6040 High Efficiency, Good Balanced Props
4 Props total (2CW, 2CCW)
PC + glass fiber material is made of a high quality, flexible and durable plastic that can easily survive crashes and tree clips.
They are NOT Indestructible, but they are durable.