This is a 4" arm that can be directly bolted on to the 5" Slim Phast Main Plate which is the larger main plate with 30x30mm stack mounting. You can use this arm to convert your full size Slim Phast 5" model to a 4".
RC Crazed Slim Phast 4" Carbon Fiber Arm
4mm Carbon Fiber
Post your build using this product to RotorBuilds.com and it will show up here! Awesome :-)
Complete builds using this part: