Replace your plastic deck plate with a more stylish, corrosion-resistant solution. Chrome-plated cast bronze construction. Deck plate key and O-ring included. Installation requires three #8 flat head machine screws (sold separately). Deck fill fits 1-1/2" female NPT (tapered thread) pipe. 3-5/8" flange diameter. 1-5/8" cutout diameter. Five-year warranty.