Contains 0.975% Pyrethrins from Chrysanthemum flowers to effectively kill and repel flies, mosquitoes, gnats and small flying moths. Size: 6.4 Ounce Kills Gnats and small flying Moths Contains Pyrethrins, a Botanical Insecticide Fresh outdoor scent For use in barns, stalls and stables. Released every 15 minutes Refill contains enough product to work for 30 days For use in the Country Vet Automatic Metered Dispenser.