Turning Point Express Mach4 - Right Hand - Stainless Steel Propeller - EX-1423-4 - 4-Blade - 14.3" x 23 Pitch [31502331]Express Mach4 Right Hand Stainless Steel Propeller EX 1423 4 4 Blade 14. 3" x 23 Pitch The Prop that put the "four" in Performance! Turning Point's Four Blade revolutionized the aluminum propeller market when introduced over 6 years ago. No one had ever produced an aluminum propeller with two different blade shapes (they call it Dual Geometry) for 90 300+hp applications. This prop is uniquely engineered with two blade geometries: two blades utilize