MATERIAL: Made of Top Quality Nylon Fiber for the Best Balance between Cost and Performance. QUALITY: Stronger than Plastic Propellers available in the Market. Flex less for better Flying Experience and Efficiency. BALANCE CHECKED*: All Xoar Props are Balance Checked. However, Transit may Affect the Balance due to the Nature of the Material's Flexibility. Pre-Flight Balance Check is highly recommended. Minor Balancing may be needed. SPEC: Type: Tractor Propeller | Fuel Type: Glow / Nitro | No XOAR logo printed on the props since 2021. Diameter Pitch Average Net Weight Shaft Diameter 7" 4 , 5 , 6 42.52 g 5 mm 8" 4 , 5 , 6 , 8 56.70 g 5 mm 9" 4 , 5 , 6 99.22 g 5 mm 10" 6 , 7 , 8 102.06 g 6 mm 11" 5 , 6 , 7 , 8 127.57 g 6 mm 12" 6 , 8 161.59 g 6 mm 13" 6 , 7 , 8 170.10 g 6 mm 14" 6 221.13 g 6 mm *Final balance check is suggested before flight due to external factors such as temperature. Handling during transit may vary the balance of the propeller.