One of the largest worldwide manufacturers of surge arrester gas discharge tubes.

• See also:
• Masterformat 2004
• 27 00 00 - COMMUNICATIONS
• 27 10 00 - STRUCTURED CABLING
• 27 20 00 - DATA COMMUNICATIONS
• 27 30 00 - VOICE COMMUNICATIONS
• 27 50 00 - DISTRIBUTED COMMUNICATIONS AND MONITORING SYSTEMS
• 33 82 00 - Communications Distribution
• Masterformat 1995
• 16700 - Communications
• 16710 - Communications Circuits
• 16720 - Telephone and Intercommunication Equipment
• 16740 - Communication and Data Processing Equipmen