Center Hole Fits: 3" pipe (2 7/8" outside diameter) Overall Size: 7 1/4" x 7 1/4" Height: 4 1/4" Bolt Pattern: 3/4" Holes Securing bolts/ anchors are not included Secure your chain link fence post to concrete with ease with this 3" (2 7/8" OD) steel floor flange. Made from high-quality and durable galvanized steel, this floor flange will be able to secure your chain link posts for the long haul. Designed with pre-drilled holes, this floor flange is simple to install. Securing bolts/ anchors are not included with this purchase, but we suggest for 1/2" 3 3/4" wedge anchor bolts to be used when securing to concrete.