Innovative features and performance have made Highline toilets an industry benchmark since 1966. Continuing the tradition is this Highline toilet bowl, provides seating at the height of a standard chair and elongated shape for maximum comfort. This bowl coordinates with several Wellworth tanks to create a complete two-piece toilet. 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. Combines with a K-5308/-RA or K-5307/-RA tank to create a complete K-5298/-RA or K-5299/-RA Highline toilet. Standard 12-inch rough-in.