Precision Spinner Size Diameter Shaft E-Flite Spinner 1 3/4" (45mm) 45mm 4,5mm E-Flite Spinner 2" (51mm) 51mm 4,5mm E-Flite Spinner 2 1/4" (57mm) 57mm 5,6mm E-Flite Spinner 2 1/2" (62mm) 62mm 5,6mm High quality aluminum 2-blade spinners made by E-Flite. Spinners are already pre-cut for APC-E electric propellers. With every spinner (2) collets are included.