KOHLER K-7116-2BZ Clearflo Closing Overflow, Oil-Rubbed Bronze Ability to close the overflow allows bather to fill the bath passed the overflow or use as a standard bath drain, filling up to the overflow. KOHLER finishes resist corrosion and tarnishing, exceeding industry durability standards over two times. Cable driven means no internal linkages, reducing potential clogging. Above- or through-the-floor installation options. Copper corrugated neck makes drain easy to fit-up on any bath slope.