PREMIUM MATERIAL: Made of Premium Top Grade Plywood, each ply is no thicker than 1 mm and with the best combination of wood and glue. It is excellent for minimal elongation, breakpoint and distortion, therefore it is the best for making Wooden Model Airplane Propellers. CNC DIGITAL IMAGING: CNC digital imaging process ensures consistent quality in diameter, propeller blade profile and pitch which are all crucial for RC aircraft performance. PRE-BALANCED: Each Xoar prop is manually finished to reach perfect surface smoothness. It is balanced both horizontally and vertically for minimal vibration caused by airplane propeller. Diameter Pitch Average Net Weight* Shaft Diameter 15" 4 , 5 , 6 , 7 , 8 - g 8 mm 16" 4 , 5 , 6 , 7 , 8, 10 - g 8 mm 17" 4 , 5 , 6 , 7 , 8 , 10 - g 8 mm 18" 6 , 7 , 8 , 10 68.04 g 8 mm 19" 6 , 7 , 8 , 10 102.06 g 10 mm 20" 6 , 7 , 8 , 10 119.07 g 10 mm 21" 6 , 7 , 8 , 10 136.08 g 10 mm 22" 6 , 7 , 8 , 10, 12 127.57 g 10 mm 23" 6 , 7 , 8 , 10 144.58 g 10 mm 24" 8 , 10 , 12 , 24 170.10 g 10 mm 25" 8 , 10 , 12 195.61 g 10 mm 26" 8 , 10 , 12, 14 , 16 223.96 g 10 mm 27" 8 , 10 , 12 226.80 g 10 mm 28" 8 , 10 , 12 , 14 , 18 232.47 g 10 mm 29" 8 , 10 , 12 272.16 g 10 mm 30" 8 , 10 , 12, 13 , 14 306.17 g 10 mm 31" 8 , 10 , 12 g 10 mm 32" 8 , 10 , 12 , 14 , 16 , 18 411.04 g 10 mm 33" 10 , 12 - g 10 mm 34" 10 , 12 428.08 g 10 mm 36" 10 , 12 , 14 , 16 , 18 601.01 g 10 mm