Elongated bowl offers added room and comfort;Comfort Height feature offers chair-height seating that makes sitting down and standing up easier for most adults;2" (51 mm) fully glazed trapway;Combines with either the K-44471 or K-44471-RA tank;Revolution 360 flushing technology generates a forceful swirling motion to keep the bowl clean longer;Weighs less than previous Highline models;Replaces Highline K-5297 bowl