GWS now offers 3-Blade versions of their popular DD series propellers for modelers that need a bit more ground clearance, or for those that want a more scale look on certain aircraft. The GWS 6x3x3 prop has a 3mm center hole pre-molded, and the hub measures 11.5 mm in diameter and 6.1 mm thick. The hub can be drilled out to 1/8", 4mm or 5mm to fit your prop shaft requirements. This prop is designed to run in the normal rotation direction, Clockwise as viewed from behind. A reverse rotation version of this prop is available on our site, and a twin-pack containing one of each style is also available. According to the widely accepted Maximum RPM formula of 100,000/D for GWS DD series props, the 6x3 DD props should not be used over 16,667 RPM. GWS