21" sonnet chimes have 4 heavy walled, center pinned tubes that emit sweet, gentle tones. All aluminum construction, durable powder coated and anodized finish, and strung with industrial cord. Each chime has an adjustable striker. Tubes are 3/4" diameter. Sentiment is printed directly onto the tubes. Each tube chime reads " Amazing Grace how sweet the sound". Length: 21". Diameter: 3.75".