Replacement Wiper Blade Plastic Posts for NJ 42E/60E/500/600/700/800/T200+ Series Park Stations. If your current wiper blade post has broken off these replacement posts allow you to replace the broken part without having to invest in a new park service station. It is recommended to change all of the wiper blade posts at the same time. Simply push your current posts from the bottom and they will pop out of the tray. Theses wiper blade posts are very simple to replace. Sold in a set of 4 pieces plus the kit includes the rubber washers which are used to hold the plastic post into the tray. Kit does not include the rubber wiper blade. These are sold seperatly.