Our deer fence heavy duty deluxe posts are made of galvanized steel and have a black vinyl coating, which blends in nicely with our fencing. The heavy duty deluxe posts are 1 5/8 inch in diameter to provide maximum support for your deer fence. The heavy duty deluxe posts utilized a ground sleeve to anchor to the ground. The ground sleeve is pounded in the ground until the top is flush with the ground surface using a drive cap (not included, you will need one for every 21 posts), the post simple slides into the sleeve 12 inches. The heavy duty deluxe posts can be spaced every 15 to 20 feet.