Complete Engineering Motor Kit Includes Six Miniature DC Motoring Units
They have a no-load speed of 9000 RPM to 25000 RPM ±10%. It features a choice of 4-vane or 3-vane designs, available in random colors including red, blue, yellow, green, and pink. Shaft Size:10x2.0mm/0.39"x0.08"(L D);.