My name is Paul and I am doing some work in this condo and the lady wanted the door fixed. This is the bottom guide for a mirror bifold door. Owner says she bought the door at Lowes but have been unable to find the door or this part she does not know manufacturer. This guide runs in a track attached to the floor. The guide measures 7/8" at the largest diameter. Plastic overall thickness is 1/4". The 7/8" diameter is 1/8" thick.The boss is 1/8" thick and 3/8" diameter with a 1/4" diameter thru hole.