All work sections feature load check, standard lever handles, a rating of 3625 PSI, and a GPM rating of 21. Control Valve: 4-Way,Double Acting,21 Gpm,3625 PSI,220851 You can request this service in the instructions field when you checkout online at BaileyHydraulics. To assemble a complete valve at least one work section in addition to one outlet section are required.