Irctek 2 pairs high performance FPV 5040 4 blade propeller CW CCW for QAV 200 210 230 250 280 320 frame etc - Red Model: 5040, size:5 x 4 inch Material: PC Hub inner diameter: M5, Hub thickness: 7mm Weight: 18g Application: QAV 200, 210, 230, 250, 280, 320 frame etc