2*30mm fine textured rubber wheels, mini, exquisite workmanship, is one of the materials for science popularization.
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Diameter: 30mm
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Aperture: about 1.9mm (compacted 2mm axle)
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Height: about 10.5mm
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Material: plastic and rubber
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Qty: 4pcs
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Color: Red or Orange optional
![](https://wxalbum-10001658.image.myqcloud.com/wxalbum/203852/20180104130609/7c6393ac8efc18d54d19b6cdcff3c582.jpg)
![](https://wxalbum-10001658.image.myqcloud.com/wxalbum/203852/20180104130610/54727865c03dbf7df049859006299389.jpg)