Fiat Style 4-1/2 in. OD Snap-In Shower Strainer Grid, 3-1/8 in. Prong-to-Prong • Fiat style snap-in shower strainer grid • 4-1/2 in. outside diameter • 3-1/8 in. prong-to-prong • Brass construction • Do not use plumber"s putty for installation