National Loop

National Loop is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Traffic Signs Signals & Equipment

North American Industry Classification System (NAICS) Categories:

• Electrical Apparatus And Equipment, Wiring Supplies, And Related Equipment Merchant Wholesalers > Alarms, Signaling & Security Equipment > Traffic Signs Signals & Equipment

Standard Industry Classification (SIC) Categories:

• Electrical Apparatus & Equipment > Alarms, Signaling & Security Equipment > Traffic Signs Signals & Equipment