All Natural Plant Based Insect Repellent Incense Sticks! DEET FREE!! A Give Back to Nothing But Nets with Every Tube Sold. Providing Mosquito Nets to Fight Malaria Worldwide 12 Sticks per Tube. Each stick burns 2 to 2.5 hours. Wind may reduce burn time. 10% Active Ingredients. Most major brands contain less than 3% For BEST RESULTS place several incense sticks in a perimeter around your patio or deck, spaced 12-15 feet apart. Keep the sticks as low to the ground as possible to keep mosquitoes from your ankles and feet. As always, read the safety use precautions on the product packaging.