It features durable construction that's designed to be unaffected by soil conditions and seals against infiltration and exfiltration. The band slots offer great flexibility and the coupling includes 300-series stainless-steel clamps that are corrosion-resistant. The stainless-steel shield helps resist deflection when buried. Fernco flexible couplings are backed by over 5 decades of proven experience have earned a reputation for their quality, reliability and superior performance.