Solas Amita 4 Propeler: PVC SX Cobra, Volvo Penta SX Units – Aluminum (8613-143-19) Traditional rubber hub. Four-blade aluminum propeller. Exclusive Solas casting process. Wide blade design specifically for 4-stroke engines Increased static thrust for heavy loads and maneuverability. Great lifting and mid-range performance. Item description: 14 – 1/4 x 19 4 blades. Manufacturer part number: 8613-143-19.