14 - 24 diameters. 2 Per Pack. High strength aluminum blades. Each propeller clearly labeled as to pitch, diameter, rotation and maximum RPM. Available for immediate delivery from stock. Top quality, epoxy painted spiders with high salt spray characteristics. Steel Fixed Hub - 1/2 bore exact propellers supplied to OEMs (no need for interchangeable hub feature since all Lau OEMs use 1/2 bore only)