Replace Your Gerber Toilet Flapper With This Two-Pack, 3-Inch Model That Comes Product Details Professional Design: This Toilet Flapper is designed to replace old, leaking, or damaged toilet seats. It is compatible with the Gerber 99-788 and helps you solve toilet leaks and save water costs. It can perfectly replace your old seat, quickly solve toilet seat leakage problems, and help you avoid all the troubles caused by toilet seat leakage. High Quality Materials: This Toilet Flapper 3 inch design uses a high-quality rubber, which is very soft and can quickly rebound after compression, providing the best sealing, which greatly helps to save water. Standard Design: The Toilet Stopper Flapper meets industry standards for pipeline specifications in the United States and Canada, making it perfect for use with 3-inch toilet flushing valves. The appropriate size design keeps it open for a long enough time to allow enough water to flow out of the water tank to flush the toilet clean. Easy to Install: Toilet flapper replacement installation is very simple and can be easily installed by insulting any tool. First, close the water valve leading to the toilet, drain the water from the water tank, remove the old leakage baffle, install our new toilet baffle, and install the chain. Attention: If your old baffle is difficult to remove, you can cut it open and do not forcefully open it to avoid damaging the faucet. Cost Saving: The packaging includes 2 gerber toilet flappers, one of which is placed in your toolbox. With this little one, you can easily repair a leaking toilet without calling the plumber, saving expensive maintenance costs. Note: Please ensure that the opening diameter of your toilet water tank is 3 inches. Our toilet baffle size is 4.9 "x 3.66" and is specifically designed for flushing valves with a diameter of 3 inches. Compatible with Gerber 99-788 Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.