【Compatibility】 This 97011919 exhaust fan cover features a seamless, no-cutout design, making it compatible with Broan-Nutone 503, 505, 507, and 509. It is the ideal upgrade for ceiling or wall fans operated by a standard wall switch 【All Parts Included】S97011919 Bathroom exhaust fan cover assembly comes with the 11.5" grille (Part# S99110916), featuring a complete hardware kit: three threaded rods (1/4"-20 UNF: 7/8", 1-13/16", 2-9/16"), one grille knob, and one mounting stud bracket 【Clean Design】Featuring a wide-open vent design for maximum airflow, the S97011919 bathroom fan cover is crafted from high-strength ABS plastic for lasting durability. Its off-white matte finish seamlessly blends with any decor 【Easy Installation】Attach the provided grille bracket to the motor mounting bracket. Select the correct length threaded rod and grille knob, insert them through the center opening of the grille, and secure it 【No Switch Cutout】S97011919 Kitchen exhaust fan cover features a seamless face with no pre-cut hole or switch. Designed for users who prefer a clean look and control their fan via a standard wall switch The 509 exhaust fan cover with middle screw is a clean-style, no-cutout replacement grille with center screw designed for Broan-Nutone models 503, 505, 507, and 509. Unlike the S97011790 model, it features a seamless appearance with no pre-cut switch hole, making it ideal for use with a standard wall switch. Crafted from high-strength ABS plastic, this cover ensures lasting durability while its wide-open vent design promotes maximum airflow. This complete assembly includes everything needed for easy installation: one 11.5" x 11.5" grille (Part# 99110916), three threaded rods, one grille knob(Part# S97011918), and one mounting stud bracket(Part# S98008494). Whether used as a bathroom fan cover or kitchen fan cover, the S97011919 helps conceal vent hardware for a clean, minimalist look that blends seamlessly into any ceiling or wall.