The Febco 905-211 Bonnet Repair Kit is designed for 1/2" and 3/4" 765 Pressure Vacuum Breakers and Backflow Preventers. It includes all necessary components for repairing the bonnet and poppet assembly, offering protection against back siphonage of toxic and non-toxic liquids. Made from durable materials, this user-friendly kit ensures easy installation without special tools. Ideal for plumbers and homeowners, it promises a robust seal and reliable performance.