The Irvine™ toilet bowl delivers powerful swirl-style flushing in a contemporary skirted design. Kohler's most complete flush ever, Revolution 360® swirl flushing technology keeps your bowl cleaner longer than a conventional flush. Installation is easy with the ReadyLock™ system: the skirted trapway installs to the floor flange and attaches to the toilet, eliminating the need to drill holes while offering the same secure installation as non-skirted toilets. Elongated bowl offers added room and comfort. Skirted trapway simplifies cleaning. Revolution 360® swirl flushing technology generates a forceful swirling motion to keep the bowl cleaner, longer. Comfort Height® feature offers chair-height seating that makes sitting down and standing up easier for most adults. 2-1/8" fully glazed trapway. CleanCoat™ technology inhibits the growth of water scale and mineral stains for improved ease of cleaning. Combines with the K-20205/-RA or K-90098 tank to create a complete K-20450/-RA Irvine™ or K-90097 Irvine™ ContinuousClean toilet. Standard 12" rough-in.