These are fiberglass filled plastic propellers. Adding fiberglass makes them more ridged/stronger then a propeller made from plastic only. These are a low cost alternative to metal boat propellers. These don't need to be balanced or sharpened. We recommend these for 10K-25K RPM Range.
Offered in 4 Sizes, all for 1/8" (3.17mm) shafts.
27mm Diameter, Pitch 1.4x27=37.8mm or 1.49" total pitch. 30mm Diameter, Pitch 1.4x30=42.0mm or 1.65" total pitch. 32mm Diameter, Pitch 1.4x32=44.8mm or 1.76" total pitch.35mm Diameter, Pitch 1.4x35=49.0mm or 1.93" total pitch.