the front and rear propellers and protect the propellers from damage when folded and stored in the backpackRaised top and bottom design to allow space for the propellers to be stored without crushing , and to hold in place during storage so that they do not run out of position or overThe propellers are fixed in place to fit the fuselage, so they can be stored like a without affecting the original lens capQuick release buckle design for quick disassembly and assemblyColor: black+grayMaterial: ABS+ siliconePackage Contents:1 x Propeller Stabilizer HolderOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.