Genuine Prier C-434KT-907 kit. This kit contains P-164KT-805 operating handle and screw kit, C-434KT-903 stem packing and washer kit, C-434KT-906 vacuum breaker repair kit, C-434KT-902 stopper and pin kit with tool and o-ring. When assembling the vacuum breaker C-434KT-906, ensure the dome is facing out on the check spider and the bottom is facing out on the silicone washer.