5040 set of 4 propellers. This includes 2 CW and 2 CCW Gemfan propellers for multirotors. These propellers are made form a mix to give them extra strength and to bend instead of break. These props draw less current then bull nose, and can spin up fast because they are lighter.

These props will flex in a crash so make sure you take a quick look to make sure the angles look the same. These are very good for racing because they will not snap when you hit a gate, you may have a lot of vibration, but your props will stay together. The Nylon Glass props are stiffer, but they can break more easily. In the end you still have to replace the prop, these might reduce what else you have to replace!