1" Top Access Silent Air Control, Scalloped, White Manf. Waterway Plastics Manf. # 660-3560 1" Top Access Silent Air Control, Scalloped Gray Manf. Waterway Plastics Manf. # 660-3567 1" Top Access Silent Air Control Scalloped, Black Manf. Waterway Plastics Manf. # 660-3561