Product Description Replacement assembly for standard nose cup for 3M Ultimate FX Full Facepiece Reusable Respirators FF-401, 402 and 403. From the Manufacturer The 3M™ Nose Cup Assembly FF-400-11 is a replacement part to use with 3M Ultimate FX Full Facepiece Reusable Respirators FF-401, FF-402, and FF-403 (sold separately). This replacement assembly is for the standard nose cup. This replacement accessory can extend the service life of respiratory protection equipment and potentially result in cost savings. For more than a century, 3M has applied innovation and technology to improving our customers’ lives and supporting their business goals. Today the company, from its headquarters in St. Paul, Minnesota, serves industrial and commercial customers and consumers in nearly 200 countries. Occupational Health and Environmental Safety products, focused on worker safety, include respirators, hearing-protection products, air-monitoring devices, environmental-safety products, and comprehensive training programs. The 3M brand, across thousands of products, represents consistency, superior quality, and value.