All MP Rotators require a Hunter Pro-Spray or shrub-head body to fit into.The PRS-40 pressure regulated Pro-Spray body is regulated to 2.8 bar (40psi) which is ideal.Four Models MP1000, 2000,3000,3500The 90 degree option adjusts from 90 degree to 210 degreeThe 210 degree option adjusts from 210 degree to 270 degreeThe 360 degree option is a true full circle head.Matched precipitation; the precipitation rate is appropriate with the spray coverage.Radius can be reduced by 25% on all models.