The Z-Spinners combine the advantages of the CN-Spinners (Cool Nose with cooling air openings) and the angled Z-middles. The angled aluminum middle pieces allow the folding propeller blades to fit even closer to the fuselage, resulting in reduced air resistance during gliding. The spinners with the middle pieces are designed for slim electric glider fuselages but can also provide benefits for wooden fuselages built in a box construction, provided they are rounded off. The middle pieces of the spinner sizes 38, 40, and 42 mm are interchangeable, allowing for example, 38 mm spinner caps to be used with the middle piece of the 42 mm spinner. This combination potential offers further optimization possibilities, enabling finer tuning to the respective fuselage. The 30 mm spinner has its own middle piece that is not compatible with the other spinner caps. The Z-Spinner includes a spinner cap made of white plastic (very paintable), a machined aluminum middle piece with an integrated mount for the tension cone, special prop rubber for folding the propeller blades, and mounting screws for the spinner cap and propeller blades.