This is a replacement part for your futon frame.  After years the original gets dried out and cracks or maybe you just lost it.  Make sure your part looks the same.  Each order gets 2 parts.

Dimensions below:

Base Diameter:37mm

Base Height:7mm

Post Diameter:24mm

Post Height:14mm

Hole Diameter:8mm

Countersink Diameter:12mm

Countersink Depth:4.5mm

Total Height(Base + Post):21mm