The original design was a plastic type pulley with a -in bushing riding on a lubricated metal shaft. Under the constant pressure of the spring and the belt, running this type of configuration in a hot environment only cause the loss of lubrication, and a lot of heat be generated between the metal shaft and the bushing that holds the pulley. Soon, the heat builds up to a high level, so that the plastic pulley melts and the metal bushing starts to drag, thereby generating more heat. Then the melted pulley is separated from the metal bushing, causing the dryer to malfunction. This upgraded ball idler is an excellent design. First, replace the bushing with a ball bearing. can withstand greater loads and help reduce friction. point is that the ball bearing assembly is a sealed assembly. This prevents debris from entering the ball bearing and maintains internal lubrication. Therefore, the heat in the environment does not cause more liquid lubrication to escape the ball bearing assembly. Keeping the lubricated ensures a long service life, and the bearing design itself helps keep friction heating to a minimum. Our dryer d replacement kit is suitable for your top or front load or dryer. Model Number: Clothes Dryer Idler Pulley Wheel MPN: DC93-00634A AP6038887 PS11771601 Replaces Part: DC96-00882C DC93-00634A DC97-07509B Fit: For Clothes Dryer colour:Silver Material:iron Package Contents: 1 x Dryer Idler Pulley 1 x Screw 1 x Gasket Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.