Check the listing for details. NC1014 replacement foam ring for Nitro or Smartkleen pool cleaners. Condition: New. Listed at 9.80 USD. Quality and affordable pool robot accessory by EZ Care NC1014 replacement foam ring for Nitro or Smartkleen type pool cleaner robots. It fits other machines such as NC22, NC31, NC51, NC52, NC52S, PT4i, PT7i. It is the foam ring placed at the middle of rear roller for enhanced traction. This is not created or sold by Smartpool or Smartkleen who has their own definition of customer service and have different quality standard from ours Nitro® is a registered trademark or trademark of Smartpool®LLC in the US and/or other countries. Smartkleen® is a registered trademark or trademark of Smartpool LLC in the US and/or other countries. Other names and products not mentioned above may be registered trademarks or trademarks of the respective companies.