Designed to fix no/slow refilling, running, and noisy toilets, the fill valve is quieter than other fill valves. The Genuine Toto Fill Valve is very easy to install and adjust; no tools are required. Simply remove your old fill valve or ballcock, insert your new Korky fill valve, and adjust.• Height: 7-3/4" to 13-1/2"• Adjustable: yes• Hardware Included: yes• Material: plastic• For all Toto toilets• Adjustable refill ratio for optimum performance• Easy to install• Adjustable height• Boxed.Additional Info:• Designed to replace all Toto Fill Valves including: Drake®, Eco Drake®, Ultramax®, and all other Toto toilet models. The innovative twist-lock adjustment makes installation easy.