Post Under Base Plate 3″x3″ – Black Aluminum

The Post Under Base Plate 3″x3″ is a foundational accessory designed to anchor aluminum square posts securely onto concrete or other solid surfaces. Constructed from durable black-coated aluminum, this base insert is compatible with both 3″ x 3″ square posts, providing essential stability without the need for in-ground installation. Ideal for decks, patios, retaining walls, or surface-mounted fence sections.

Specifications:

• Material: Powder-coated aluminum

• Color: Black

• Compatibility: Fits inside 3″ x 3″ square posts; Works with surface-mount base plates.

• Fastening: Pre-drilled holes for anchoring; Bolts/screws not included.

Key Features:

• Enables strong fence post installation without digging

• Perfect for flat surfaces where in-ground posts aren’t feasible

• Slides inside the post to provide structural rigidity

• Matches your post system for a uniform appearance

• Drill-ready and compatible with standard base plate hardware