Product Description The product is easy to use. The product is highly durable and handle. The product is manufactured in China. From the Manufacturer Adjustable Anti-Siphon Toilet Tank Fill Valve and Hornet V Flapper Kit, Features Patented 1/4-Turn Height Adjustment, Fill Valve: Adjusts from 9" to 14" Height, Black and Yellow, Includes (1) Metal "S" Clip, (1) Plastic Refill Tube, (1) Plastic Lock Nut, (1) Plastic Fill Valve Connector Nut, (1) Rubber Cone Washer, (1) Rubber Shank Washer, and (1) Hornet V Flapper