Febco RK-765 Series 1/2" and 3/4" Bonnet and Poppet Assembly Kit, Includes O-ring, E-ring, Washer, Stem, Rubber Disc, Genuine Factory Replacement Parts

Do I need more than this? Or is this good? I don't know if I need to replace that bell looking thing on top as well. Link: Febco 765 Repair Kit

This seem right? Link: Febco Repair Kit