Nice set of micro-motors. I bought them to replace a defective motor on a coffee frother. As all dimensions are exactly as advertised, this job was very easy. What took me more time was just to find a motor according to needed measures. I would wish to have a way to doing this search job easier.
Online store: AliExpress
US $2.23 7% OFF|5PCS/LOT Brand new Mabuchi 140 micro DC motor RE 140RA 18100 1.5V 3V 21*25mm toy/small fan motor ~-in DC Motor from Home Improvement on Aliexpress.com | Alibaba Group
6.9 USD