Solas Concord Impeller - YF Series - Pitch 11/14 YF-CD 11/14 Constructed of ultra high-strength, corrosion-resistant stainless steel Exclusive hub-end water seal keeps the nasty stuff out of precious parts Mirror-smooth finish and polished hub resists cavitation Impeller pitch is determined by casting, not bending This unique impeller enhances all-range maneuverability with no slippage in water hookup