White Bushing used in Lever Style Recliner Mech Allows Drive Tube to Work With Mech Drive Tube Not Included Furniture Rehab Set of two grommets to hold the drive tube in place on your Reclining Mechanism. Each grommet fits on either end of drive tube to create a snug fitting inside lift Mechanism. The outside lip measures 1 inch. Inside the opening is 5/8 inches. And the external protrusion is 3/4 inches. This grommet goes with a 5/8 inch drive tube.