Diameter: 3.0mm thickness: 1.8mm
Diameter: 4.0mm thickness: 1.8mm
Diameter: 5.0mm thickness: 1.8mm
1 set = 4 internal air vents and 4 metal rings.
* Choking hazard, not for children under the age of 8.
* This product contains only the expansion package/part for a kit thus an original kit is not included.
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