Size: outer diameter: 32mm, inner diameter: 23mm
Opening into box: 27mm * height 80mm
Bottom outer diameter: 23mm, bottom inner diameter: 20mm
| Tone guide, loudspeaker, inverted tube, air duct, |
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| Item： | Thumb sound hole | Product Name： | Tone guide, loudspeaker, inverted tube, air duct, |
| Descriptions： | Material: new ABS
Size: outer diameter: 32mm, inner diameter: 23mm
Opening into box: 27mm * height 80mm
Bottom outer diameter: 23mm, bottom inner diameter: 20mm |
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