Hubbells Exclusive Extra Heavy Duty Industrial GFR is specifically designed and built to withstand demanding applications and environments. Factory equipment, portable generators and waste water treatment plants are just a few of the many challenging installations requiring an additional level of performance. The industrial GFR meets these unique applications through innovative design, superior materials and a corrosion resistant robust construction.This safety solution includes Tamper-Resistant (TR) and Weather Resistant (WR) as standard construction.