Brushless slotless motors consist of a basket winding inserted into a ring lamination containing no teeth or slots. Because of the design, brushless slotless motors yield very smooth rotation, virtually eliminating cogging from the motor. They are also electrically more efficient than slotted motors designs, and less voltage is required to achieve the same amount of power. Other advantages of brushless slotless motors include lower resistance, electrically more efficient than "slotted" motors; lower magnetic losses thus lower heat, and lighter weight. Units that are autoclavable are also available. Ranging from less than 1" in diameter to 4" diameter, brushless slotless motors are well suited for slow speed, low cogging applications to extremely high speed (over 40,000 rpm) applications.