Solas Rubex Pro L4 - Stainless Steel Interchangeable Inflator - PROP RBX/PRO4 SS E/CS 24 - 15" x 24" 4 Blades (9577-150-24) High performance precision lab finished propeller. SAV (Solas Adjustable Vent) technology for increased throw and torque. High speed performance with tin lift and increased acceleration for offshore and performance boats. Interchangeable with Flo-Torq and Vortex system. SOLAS High Performance Rubber Tube Three blade stainless steel impeller. 15" x 24" 4 blades.