he autprop APS H5 zinc propeller spinner is an essential component for protecting the propeller shaft and metal parts of your sailboat from corrosion caused by the marine environment. Made of high-quality zinc alloy, this spinner is designed for long life and superior performance, even in the harshest conditions. a=55 mm; b= 21 mm; h= 32 mm; i= 41 mm; Ø= 34 mm; Ø1= 27 mm; Ø2=7 mm; Ø shaft = 20-35 mm