This stainless steel post base will provide a beautiful finishing touch to your patio in addition to fastening it to 3 1/2'' (8.89cm) x 3 1/2'' (8.89cm) square posts. This 4'' (10.16cm) x 4'' (10.16cm) base is designed to be used with ''Fixplak 44'' connector. Its stainless steel construction offers increased durability. Its powder coated finish is rust resistant and maintenance-free. Quick and easy installation.