base support bracket for 4x4 posts. Inside dimensions are 3.6 x 3.6 inches. Wall thickness 3/16". Galvanized and black powder coated.4 x 4 base support bracket$40.00PriceQuantity*Add to CartPRODUCT INFOArm Height: 8" Metal Thickness: 3/16" RETURN AND REFUND POLICY20% restocking fee will be charged for all returns. SHIPPING INFOPick up at our Stoney Creek warehouse. Please contact for pick up appointment.