Features: 3inch suitable with 11/13/14 series motor; Support 3inch propeller(3025 3028 3035 3052 3056); Motor hole:9-12mm; Guard thickness:2.5mm; Package include: 4pcs 3inch propeller production rings; Specifications: Material: ABS Applicable models:for Micro Quadcopter 3inch Frame Kit Color: Black Diameter:Approx.43mm/1.7in Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 4xPropeller Guards Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin