21-109 Membrana de Carton sin agujero con borde de 1.25cm
https://electronicarych.com/shop/21-109-21-109-membrana-de-carton-sin-agujero-con-borde-de-1-25cm-14432
https://electronicarych.com/web/image/product.template/14432/image_1920?unique=3007e75
Radio: 6.5cm
material: carton
