The Flexible Coupling by Fernco 4x4" made of an elastomeric compound that meets requirements of ASTM D5926.

• Leak-proof, root-proof & resistant to chemicals, ultraviolet rays, fungus & sewer gases
• Stainless steel clamps are corrosion-resistant & rust-proof
• 140 degrees maximum temperature
• Pressure tested to 4.3 PSI
• Made in the USA