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Energy Efficiency World™ 12" RulerEnergy Efficiency Ruler - Imperial & Metric UnitsSave Energy Flexible RulerKids Energy Conservation Mood RulerSchool Supply Kit
12" Recycled Plastic RulerFold 'Em Ruler12" Energy Efficiency Dual Scale Ruler with LED Twist12" Energy Efficiency Ruler with LED Twist12-inch Flexible Mood Ruler
Clean Efficient Natural Gas Ruler12" Energy Conservation Ruler6" Energy Conservation Ruler