Please measure your chairs ball end before placing an order. For sale I have a set of 4 Replacement Chair Glides. The chairs ball end should measure 7/16”. The Glides are 3D printed in PETG plastic. Each Glide has a 1” diameter 5/32” thick black felt pad installed, ideal for use on hardwood floors. Replace damaged Glides or customize with colors. Please message with questions. Thank you! Install Instructions: Place Glides on the floor. One Glide at a time, place the chairs ball end on top of the Glide. Slowly apply downward pressure on the chair until the ball end is inserted into the Glide.