65Drones RotorX RX2535 2.5" Quad Blade Propellers (2 packs) 2.5" quad-blade propellers. - Central interlocking hub - Can be used as quad propellers or separately as dual blades propellers - Ideal for RX1105b, RX1102 high KV motors package include 2 packets ( each packet contains 4 x CW props and 4 x CCW props, and 8 x m2x7 mounting screws.)