Mine came with none on either but they sent some for that with the airball kit. I put mine on because there is enough other metal in the machine to tear up the balls already. I did run into a problem though on the right side the post was too close to the shooter lane wall and with the rubber on there it trapped the ball so I had to cut that side of the rubber flat. I also left the rubber off of the adjustable plastic post which still allows for monster side drains.