Repair your leaky outdoor faucet with the Danco repair kit. This repair kit can be used to replace worn or stripped handles on all types of valves. Repairing the leak is an inexpensive alternative to buying an entire shut-off valve. This Mansfield frost proof sillcock vacuum breaker repair kit fits series 300, 400 & 500. It includes all replacement seals & hardware required to stop leaks & improve performance, including bonnet & packing, large o- ring, small o-ring, brass washer, back flow washer & seat screw.