2 Pack Shower Drain Backflow Preventer, Odor-Proof Floor Drain Insert with Magnetic Valve, Hair Catcher and Trim-to-Fit Rubber Ring, Fits 1.6"3.9" Bathroom, Basement & Laundry Drains

Magnetic Backflow Prevention Built-in magnetic closure valve opens when water drains and closes automatically when water stops, helping reduce unpleasant drain odors, sewer gas and backflow from floor drains. | Hair Catcher Helps Reduce Clogs The removable hair catcher captures hair, soap scum and small debris before they enter the pipe, helping keep shower, bathroom, basement and laundry room drains flowing smoothly. | Fits 1.6"3.9" Inner Diameter Drains Comes with a trim-to-fit rubber reducer ring that can be cut to match different drain openings. Designed for floor drains with 1.6" to 3.9" inner diameter. | Easy to Install and Remove No tools, glue or plumber required. Simply trim the rubber ring if needed, insert the drain core, and place it into the drain opening. Easy to remove for rinsing and maintenance. | Practical for Multiple Areas Ideal for shower drains, bathroom floor drains, basement drains, laundry room drains and utility areas. Helps solve common drain odor, slow-drain hair buildup and backflow concerns.