Polyester Blend Fabricated from solid brass for reliability Fits 1-1/2" (nominal) NPSM coarse thread drain shoes 1-7/8" OD (actual) thread diameter Verify thread type and size on your existing drain, prior to purchasing this item 2-13/16" overall drain diameter 1-3/8" thread length Convenient tip-toe/push button pop-up drain design Corrosion-resistant finish Designed for long-lasting durability Easy installation