The KOHLER Wellworth toilet tank features graceful curves and a 1.6 gpf Class Five® canister flush, which harnesses the natural, powerful cascade of water to increase the strength and effectiveness of every flush, clearing the bowl with confidence while using just 1.6 gpf. A left-hand Polished Chrome trip lever complements the streamlined design. Its minimalist silhouette lets you create a customized toilet by pairing it with a coordinated bowl, and it coordinates beautifully with other products in the Wellworth collection.