- Material: aluminum case + stainless steel balls<br />- Include 32 stainless steel balls<br />- Ball diameter: 8mm<br />- Comes with Chinese manual<br /><br />                                                                                                                                Dimensions: 4.13 in x 4.13 in x 0.39 in (10.5 cm x 10.5 cm x 1.0 cm)<br />Weight: 4.34 oz (123 g)<br /><br />