NSS 2692831URE Urethane Version Of 26-9-2831 for NSS. Polyurethane blades are commonly used for special situations where heavy oils or chemicals exist. These urethane blades are also very abrasion resistant and can be used in glass manufacturing facilities, bottling plants, or other areas where broken glass may be an issue. These can also be used on concrete sidewalks and similar abrasive surfaces. Blade has 5 mounting holes. Priced Each. Replaces NSS 26-9-283-1URE. Our Part Number NSS 2692831URE