Well since my stock 10" blade exploded mid flight the other night I switched to APC blades. These are the 8" APC blades. I will be getting the 10" also when they come back in stock at my local hobby shop. Just a little over $8 for all 4. I did not balance them. They were about perfect out of the package. All I did was use a prop reamer to open the hole a bit to fit the DJI motors. These blades have a lot of meat on the hub.