Description Barrington, Highline, Northline, and Wellworth Toilets 2-3/8 inch Replacement Toilet Flush Valve Kit with Adjustable Overflow Tube and Extra Seals. Kohler Part # 85406 Replacement Fits Kohler Barrington Series Model #s K-3530 – Tank #s K-4519 Includes triangle tank-to-bowl gasket and metal bolts to secure Includes upgraded hardbody flapper with 2 extra seals 2.3 inch flapper valve assembly Adjustable Overflow Tube from 7.5″ to 12″ for strongest flush For 2-piece Toilets The more water you can put into your toilet tank the better it will flush Flapper valve has separate replaceable silicone ring for a super seat Best two inch flapper valve assembly on the market Proudly ships FREE in the USA! Flush Valve Easy Measuring Tips – Video One piece or Two piece which is right for you? Video