Titan 700-587 Upper Piston Guide is same as Titan 0509584.
It is compatible with these models: Impact 440, Impact 540, Impact 640, PowrLiner 1800M 2800M, PowrLiner 2800, RentSpray 450 Airless Sprayer, PowrLiner 3100 RentSpray 500 Airless Sprayer, RentSpray 600 Airless Sprayer, RentSpray 700 Airless Sprayer, Advantage 500, Advantage 400, 690gxc.