ACME 3751 4 Blade 16.5" x 15.5" Propeller Black Friday For over 20 years Ronix For over 20 years Ronix has been designing boards recognizing that your shoulders and hips are not always parallel in wakeboarding The ACME 3145 4 Blade 16" x 13" Propeller is a true performer thanks to ACME's continued devotion to push the ski and wakeboard boat propeller industry to new heights inboard props are helping ski and wakeboard boats achieve performances never before seen The ACME 3751 4 Blade Propeller will perform up to and surpass the standards you expect from the moment you pull it out of the box and put it on your boat a process that offered little precision and had severe limitations for the size and shape of the blades