Kunststoffspinner 60mm 3 Bl. Graupner 1070.3 with indented base plate. The GRP-reinforced base plate of the spinner is installed between the prop driver of the engine and the propeller. The spinner cap of tough plastic is fastened to the prop retaining nut by a socket head screw. An adequate retaining nut is furnished with the spinner. A suitable retaining nut is available as an accessory for engines sporting other shaft threads. Concerning the shape of the spinners you have the choice between blunt, slender and particularly slender (»JET STYLE«) type) ones.The »JET STYLE« type spinners are suitable for engines having a capacity of up to 4 cm³.