Back Opening Bellow 12 cm makes the authentic "cuckoo" sound from a Cuckoo Clock. This Bellow is a back opening Bellow that has a length (L), as shown in the diagram, of 12 cm. (Length of column excluding the foot)
Back Opening Bellow 12 cm makes the authentic "cuckoo" sound from a Cuckoo Clock. This Bellow is a back opening Bellow that has a length (L), as shown in the diagram, of 12 cm. (Length of column excluding the foot)