BC40Z, 4×4 Dual Purpose Post CapBase ZMax, Reduces The Chance Of The Post Splitting Eliminates Nailing Into End Grain, Provides An Easy Secure Connection Between Post Beam, Made With 18 Gauge ZMax Galvanized Steel, Install With Three 16D HDG Commons Or 16D x 212 HDG Joist Nails Into Each Side On Surface A, Four 16D HDG Commons Or 16D x 212 HDG Joist Nails Into Each Side On Surface C, Total Fourteen 16D HDG Commons Or 16D x 212 HDG Joist Nails