FM & UL Approved 304 Stainless Steel Braided Flexible Fire Sprinkler Hose - NPT Threaded Drop Pipe. FM & UL Certified: Products are FM approved and UL listed, meeting strict fire protection standards. Corrosion Resistant Material: Manufactured from high-powered stainless steel (304/316) for durability and leak resistance. Seismic Shock Absorption: Stainless steel hose absorbs seismic shock to maintain system operation during earthquakes. Flexible Installation: Can be re-shaped and relocated without draining the system or using special tools. Cost Saving Design: Unique connection mode saves time and cost compared to traditional hard pipe systems. Customizable Packaging: Packaging cartons and labels can be customized according to customer requirements. Wide Customization Options: Supports customization from samples, designs, and flexible minor customization.