The pressure vacuum breaker repair kit is compatible with the 1/2, 3/4 and 1 model 720A pressure vacuum breaker assemblies. Repair Kit components come packaged with everything you need for easy repairs, including bonnet Washer, Bonnet O-Ring, Load Nut and Guide, Load washer, Upper disc, Poppet, Spring, Spider screw, Lower disc, Guide spider and Hex nut.