This part is a Cal Spa Gray 3 1/2" Jet Insert Maxi Flow Reg Face - 2001 American Products..

You remove this jet but taking a small flat screw driver and sliding the tab found inside the face around the edge out and grabbing the face and sliding the jet out of the body..

White, Directional, nozzle, 210-6100, 2106100, 5226601, 210-6040, 210-8750, 210-9790, 2106040, 2108750, 2109790, 609784, 610237, 806105021168, 806105025876, 806105026224, 889946108, WWP2106040, WWP2109790, 210-6050, 210-6060, Waterway Poly Jet Caged Style, 210-6750, 25583-000-000, 609785, 806105023636, 9400-03U, WWP2106750, 2106050, 2106060