Unger 18 Inch Red SmartColor 15.0 Microfiber Sleeve NS45R OmniClean System It is 21mm in diameter

It is 21mm in diameter and made of lightweight aluminum

These replacement sleeves are easy to remove and disposable after use

The Unger Auto Squeegee is a squeegee and scrubber in one

and a pocket scraper all at once

It has teeth in the bottom jaw to hold in the rubber of clipless channels

Unger 18 Inch Red SmartColor 15.0 Microfiber Sleeve NS45R OmniClean System It is 21mm in diameterThe Unger 18 Inch Red SmartColor 15. 0 Microfiber Sleeve is made of 15mm pile microfiber and can penetrate small surfaces and remove dirt. The sleeve is long lasting, durable, and easy to wash. It can absorb up to 6 times its own weight. The sleeve comes in an easily identifiable red to prevent cross contamination. Size: 18 inch Unger Part No. NS45R