Shower Drainer Cover Screw Holes Center to Center Measures 3-3/8" (85.7mm), 0.4-inch Big Drainage Hole for High Flow Rate O.D. 4" (101.6mm) Round Shower Stall Drainer for Replacement FIT: Installs on 3-3/8-inch centers using 10-24UNC screws Screw Holes Center to Center Measures 3-3/8" (85.7mm), 0.4-inch Big Drainage Hole for High Flow Rate This Floor Drain Cover is Made of 14 Gauge Premium Grade (1.8mm) 304 Stainless Steel, Thick enough, Avoid Deformation This is Screw-in Type shower drainer cover, NOT SNAP-IN TYPE,And, Pls Measure before Purchase (Outer Diameter and Screw Hole to Hole) The drain cover filter has a wide range of uses, and it is often used in general households. Mainly used in shower rooms, kitchens, balconies, floors, etc. Installation Type: Screw-in Type, NOT SNAP-IN TYPE Material: 304 Stainless Steel Thickness: 1.8mm Diameter: 4 inch (101.6mm) Installation Hole: 3-3/8 inch ( 85.7mm) Center to Center Diameter of Drainage Hole: 0.4 inch (10mm) Screw Size: 10mm (Total Length) Package Included: 1pcs Drain Cover, 4pcs Screws Attention: Pls Measure before Purchase (Outer Diameter and Screw Hole to Hole)