Get in touch

Ductile Iron Loop Box

Innovative products for loop installations

The NAL Ductile Iron Loop Box is designed to positively connect inductive loop tails installed in the road surface into a duct at the edge of the carriageway. The Loop Box is manufactured from ductile iron with a one-piece D400 (40T) cover and has four loop tail entry slots to enable connection from all directions. It offers a simple cost-effective solution to traditional installation and maintenance problems associated with inductive loops in the carriageway.

Would you like to receive information regarding products, services, news and promotions from NAL? We won't share your details with other companies. For more information about how we store your data view our privacy policy.

Product Benefits

  • No need to slot cut through kerb
  • No risk of damage during additional installations
  • D400 one piece non-rocking cover
  • Octagonal shape allows easy core drilling
  • Multi directional access (4 way)
  • Base seal eliminates risk of blockage to ducts
  • Base duct connector for 63mm or 110mm duct


Sign up for exclusive news, events and announcements


For more information see our Privacy Policy.