XOAR PJT 18x10 Carbon Fiber RC Airplane Propeller. 18 Inch 2 Blade CF Prop for Gas Engines PREMIUM MATERIAL: Made of Premium 3K Carbon Fiber Fabric and Epoxy Resin. Carbon fiber's strength is excellent for minimal elongation, breakpoint and distortion, therefore it is the best for high performance RC Planes Propellers. LIGHT WEIGHT: Xoar Carbon Fiber Propellers are constructed with foam filling to ensure the lightest weight with great strength. PRE-BALANCED* : Each Xoar prop is balanced both horizontally and vertically for minimal vibration caused by airplane propeller. SPEC: Diameter: 18 in | Pitch: 10 | Weight: 75g  5 g | Shaft Diameter: 8mm | Type: Tractor Propeller COMPATIBLE ENGINES: 30 - 40 cc Engines - DA35, DLE35RA, DLE30, EVOE33GX or similar