Stainless steel rigid conduit. Manufactured in type 304 and 316 stainless to meet any stringent sanitary condition. Polished to a bright, easily maintainable finish that is modern, attractive, easy to clean and that also enhances the surface's resistance to pitting and bacterial corrosion. Calbrite stainless steel rigid conduit functions in exactly the same way as any other metallic conduit. There are none of the labour-intensive procedures that come with PVC-coated installations, nor the complicated maintenance and repair procedures. Standard NPT threads allow for trouble-free installations. Includes one coupling with each length purchased. Certifications and Compliances: UL/cUL 6A Listed; UL File # E230584; Article 344, National Electrical Code (NEC); CSA C22.1; Canadian Electrical Code (CEC), Part 1, Standard for Electrical Installations; NSF/ANSI 169 Certified - Features: Manufactured in type 304L and 316L stainless steel to meet the demands of any corrosive environment; Polished with standard .brite. finish to increase corrosion resistance and aesthetic appearance; Calbrite stainless steel rigid conduit is installed in the same way as any other metallic conduit; there are none of the labor-intensive procedures that come with PVC-coated installations, nor the complicated maintenance and repair procedures; Standard NPT threads allow for trouble-free installations; Approx. Heat Tolerance = -150±F to 1600±F; Includes one coupling with each length purchased - Applications: Stainless conduit is specified in corrosive applications that exceed the limitations of aluminum, fiberglass, rigid steel, PVC, and PVC coated conduit. Calbrite.s Type 304 and 316 UL-listed stainless steel conduit meets and exceeds current requirements for wash down and harsh/corrosive environments and satisfies the strictest mandates for plant cleanliness by various state agencies and hundreds of common regulatory requirements.