Douglas Large Plastic Insert Bushing Set of 4

The Douglas insert fits into the post of the chair base and attaches to the swivel tilt mechanism that is attached to the bottom of the seat. This is a heavy duty insert and may not look like the insert in your chair. Be sure and follow the measurements below. There are two sizes of Douglas plastic inserts which fit inside the post of the chair base. The swivel tilt mechanism fits into the insert .Fits in the post with the inside dimension of 2 1/16". Top of the insert measures 2 3/8". 4 inserts included.