Gretsch Genuine Replacement Part Rancher soundhole cover
Martin SPA soundhole cover/feedback buster
Boston classic guitar mute, soundhole mount, 8,5cm soundhole diameter (standard size)
Boston copriforo antirisonanza per chitarra acustica, diametro del foro 10cm
Martin SPA soundhole cover/feedback buster, for DR/J/GP guitars, 4” (10,1cm) diameter
Martin SPA soundhole cover/feedback buster, for OO/OOO/OM guitars, 3.875" (9,8cm) diameter