▼ Please measure all your posts and evaluate the compatibility before order. ▼ Including: 1 Base with flange tube ; 1 Interlocking cover ; 4 Anchor bolts ; 4 Tapping screws. ▼ Materials: (1) Base + Flange: Heavy duty structural steel + AAMA2604 powder coating ; (2) Cover: PA66 + 30% fiberglass ; (3) Anchor bolts: SUS#304 Stainless Steel ; (4) Tapping screws: Galvanized steel. ▼ This flange FITS 2" (outer dimensions) square post tube in thickness: 11GA gauge (3mm) or thinner. ▼ The OD of the middle flange tube is 1-9/16"x1-9/16". ▼ The distance (center to center) of each two bolt holes is 3-1/5". ▼ The anchor bolts are 7/16" x 2-1/2". ▼ How to Measure for Fitment: Please use a caliper (digital or vernier) and measure with an accuracy of ±0.001 inches. (1) Use the inside jaws of the caliper to measure the inner diameter (ID). (2) Use the outside jaws to measure the outer diameter (OD). (3) Wall Thickness = (OD - ID) ÷ 2. (4) Reminder: This flange fits 2" square post tubes (outer dimensions) with a wall thickness of 11 gauge (3 mm) or thinner. ▼ Installation: (1) Install the base with 4 anchor bolts on concrete floor. (2) Put the post on the flange and down to the bottom. (3) Secure the post with flange by tapping screws. (4) Put on the interlocking cover. DONE! ▼ Benefits: (1) All-in-one kit for simple & quick installation. (2) A solid & safe base flange for post of fence panel, gate, railing, handrail on concrete floor. (3) Maintenance free & long-lasting due to weather-resistant materials used. ▼ Important Size Reminder: Please carefully measure your square post's dimension - must be 2''x2'' and thickness (11GA/3mm or thinner) before use, and ensure compatibility with the flange tube's outer diameter (1-9/16'' x 1-9/16'') and bolt hole spacing (center to center 3-1/5''). Size mismatches may affect compatibility - do not skip the step.

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