1-1/2 IN. COARSE THREAD FIT: Designed for NPSM drain shoes with 1-7/8 in. – 11-1/2 UNC external threads; verify size before purchase MUSHROOM-STYLE FULL COVER: Sleek European-style cap provides a smooth, modern finish that fully covers the drain opening TIP-TOE OPERATION: Easy push-to-close, push-to-open mechanism with adjustable plastic cartridge for reliable performance DURABLE CONSTRUCTION: Built with high-quality materials to resist corrosion and ensure long-lasting use EASY TO INSTALL: Simple to screw in by hand; ideal for DIY upgrades or professional bathtub renovations