Get long-lasting fly protection with Tri Tech 14 Fly Spray by Farnam. This fly spray is a customer favorite that protects against horse, house, stable, face, horn and deer flies, gnats, lice, deer ticks and mosquitoes. With the combination of two ingredients, Tri Tech 14 knocks flies down quick with residual control. Tri Tech 14 also features a newly designed spray bottle is leak-proof with an easy-to-handle, ergonomic design.