This ductile iron inspection chamber covers is suitable for medium duty domestic applications in gardens, paths and driveways. Key Features: For use in a Group 2 Class B125 environment Complies fully with BS EN 124:1994 and is Kitemarked by BSI Manufactured from strong and highly durable ductile iron A patented safety keyway prevents accidental disengagement during the lifting operation. Also compatible with standard D400 lifting keys. Incorporates a single seal labyrinth arrangement to help prevent odour escapes and water ingress.