Cutter Citro Guard Candle, Blue, 11-Ounce EFFECTIVE DECK & PATIO AREA REPELLENT: Repels mosquitoes and other flying insects. MADE WITH REAL CITRONELLA OIL: 11-ounce candle burns for up to 20 hours. PERIMETER OF PROTECTION: Use several Cutter CitroGuard Candles to maximize the repellent barrier. GENTLE GLOW: Sturdy plastic candle available in blue, green, red, white, yellow, metallic copper and metallic silver to enliven any outdoor dcor. FOR OUTDOOR USE: Perfect for patio, porch, deck or campsite.