(4 Count) Simpsong Strong-Tie ABU44/ABU44Z 4 x 4 Adjustable Post Base 3-9/16"w x 3"l x 5-1/2"h 5/8" Anchor Diameter Use with 12, 16d Nails and 2, 1/2" Bolts 16-ga Base and 12-ga Strap Zinc galvanized finish