1 Each. Wasp and hornet spray features a powerful formula to kill flying pests on contact and provide residual killing action for up to 60 days. Strong spray reaches nests up to 17' above the ground to keep you at a safe distance. Bag on Valve (BOV) technology uses the power of air to safely apply the repellent without any chemical propellants. Advanced spray action reaches difficult-to-access corners, cracks and crevices. Wasp and hornet spray is perfect for eradicating bees, wasps, yellow jackets and hornets.