- Aluminum alloy material<br /> - Compatible with 2.3mm motor shaft<br /> - Package comes with 5 adapters<br /> ?                                                                                                                                Dimensions: 1.10 in x 0.55 in x 0.39 in (2.8 cm x 1.4 cm x 1.0 cm)<br />Weight: 0.78 oz (22 g)<br /><br />