Heli-Max 1Si Rotor Blades, Black/WhiteThese are the Rotor Blades for the 1Si Quadcopter from Heli-Max. FEATURES: Flexible plastic construction.Features of Heli-Max 1Si Rotor Blades, Black/White FEATURES: Flexible plastic construction INCLUDES: Two Black and two White Rotor Blades jxs 11/21/13 ir/jxs..