This is the Sport Spinner and 8x4 Folding Prop for the / Great Planes Siren EP Hotliner - GPMA1065. / This is the prop/spinner when using a Brushed motor with the Siren ARF. / / FEATURES: Composite nylon construction, Black in color / / INCLUDES: Two folding prop halves / One aluminum prop hub / Two 2x9.7mm steel pins (for installing props to the hub) / Two 2x8mm self-threading screws (for securing the spinner to the hub) / / REQUIRES: Assembly and 3mm set screws DTXQ0301 for installation / / SPECS: Length: 8" / Pitch: 4" / kpm02/03/2005 / ir/jxs / set screw info updated tjt 033105