Description: Item is a 3/4" Flat stem bumper glide that will fit any outdoor or indoor patio chairs. This purchase comes with 4 pieces. It is a good reminder to make sure that you have measured your chair legs dimensions so the coved stem fits properly, these items are made to fit against tube frames. Glide installs inside the holes on the round base of swivel chairs. Please be sure to measure the inner diameter of the hole to purchase the correct glide. Typically used on base of swivel chairs. The stem bumpers keep the round base of the patio chair from sitting directly on the ground. Most swivel bases use 6 to 8 stem bumpers per chair. Stem bumpers can be flat or coved (curved) to fit the shape of the tubular metal of the patio chair base.