Sntieecr 6 Set DC Motors Kit, Mini Electric Motor 3V 15000RPM with 66 PCS Plastic Gears, AA Battery Holder Case, Motor Bracket, Shaft Propeller and Rocker Switch for DIY Toys Science Projects from Sntieecr

Colorful Shaft Propellers -- 12 Pieces 2 style different colors shaft propellers, 6 pieces 4 Vanes shaft propellers, 6 pieces 3 Vanes shaft propellers can meet your different needs, let you make science and STEM projects much more fun and more choices to fit your experiments DC Motors -- Body Diameter: 28mm/ 1.06"; Mounting Hole Distance(center to center): 15mm/ 0.59"; Shaft Size: 10 x 2.0mm/ 0.39" x 0.08"(L x D); Motor Body Length: 38mm/ 1.46" Wide Applications -- This complete motor kit take everything you need for DIY toys, such as mini fan, cars, boat, planes, electric toys etc. The mini wheel, axle and plastic gears can make small STEM toys very simple by matching anything Package Included -- 6 x DC Motor, 6 x Battery Holder Case, 6 x Rocker Switch, 6 x Motor Mounting Bracket, 12 x Electronic Wires(3.92"), 1 x Heat Shrink Tubes(40cm⌀3mm), 66 x Plastic Gears, 6 x Shaft Propeller with 4 Vanes, 6 x Shaft Propeller with 3 Vanes, full DC motor kit for your kids DIY amazing toys Pay Attention -- Suitable for 8+ years, please see the photo carefully, use the correct circuit diagram to avoid short circuit, short circuit will produce high temperature and cause the battery holder case to melt and burned, the kids must use under the supervision of adults