![Open wrap, short](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_-offene-Bauweise-kurz.jpg?media=1674296457)
Open wrap, short
![Open wrap](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_offene_Bauweise.jpg?media=1674296457)
Open wrap
![Traditional wrap, changeable](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_-traditioneller_-Ventilverlauf_auswechselbar.jpg?media=1674296457)
Traditional wrap, changeable
![Thayer valve, open wrap](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Thayerventil_offener_Ventilverlauf.jpg?media=1674296457)
Thayer valve, open wrap
![Hagmannventil, double O wrap](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Hagmannventil_Doppel-O-Verlauf.jpg?media=1674296457)
Hagmannventil, double O wrap
![Hagmann valve, 8-shaped](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Hagmannventi_8form.jpg?media=1674296457)
Hagmann valve, 8-shaped
![Bass trombone, traditional wrap](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Bassposaune_traditioneller_Ventilverlauf.jpg?media=1674296457)
Bass trombone, traditional wrap
![Bass trombone, open-flow valves, traditional wrap](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Bassposaune_open-flow-Ventile_traditioneller_Verlauf.jpg?media=1674296457)
Bass trombone, open-flow valves, traditional wrap
![Hagmann valve, open wrap](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Hagmannventile_offener_Verlauf.jpg?media=1674296457)
Hagmann valve, open wrap
![Bass trombone, Hagmann valves, Quart valve, 8-shaped, ES-D-valve open](https://usercontent.one/wp/helmut-voigt.com/wp-content/uploads/2017/08/Helmut-Voigt_Bassposaune_Hagmannventile_Quartventil_8form_ES-D-Ventil_offen.jpg?media=1674296457)
Bass trombone, Hagmann valves, Quart valve, 8-shaped, ES-D-valve open