Motor Miniature D.C. Mm10. A range of miniature, circular DC motors, ideal for models and educational applications (the MM10 version has flat sides). Shaft Dimensions (L Dia.): MM10: 8.1 2.0 mm. Dimensions 25 x 20 mm (L x Dia). 1.4 - 5.0V range. 16,000 rpm. RoHS compliant. Sold as pack of 10.