Mounting socket for the ball-catcher post. Made of 90x90x3 mm profile, hot dip galvanized. It can have two lengths 500 mm or 700 mm. In the top part of the socket there are welded in the M12 nuts for the bolts that clamp and regulate the ball-catcher post. These welded in M12 nuts are also for the steel wire handle to fix the net. In the bottom part there is steel fi 12 rod welded in or M12 screw to block the post.