<b>Please MEASURE YOUR TOILET SIZE to determine if you need ROUND or ELONGATED (above image shows how to measure your toilet).</b> <br> <b>Advantage Design:</b> <br> 1.Creative Hinge Base Design(One Piece Hinge Base): EASY INSTALLATION. Put the hinge base on <br>pan above the toilet holes. Screw the bolts. Then put the hinge cover in. Finished! <br> 2.PREVENT SHIFTING. Two hinges are together in one Mounting base(hinge base). Solid and <br>Stable. Much better than the 2pc separated hinge bases(Round) which most customer <br>complaint it is easy shifting after some days using. <br> Quick Release Button was designed beside instead of on the middle: <br> MORE CONVENIENT. Easy to Operate . Only click the button beside, you can feel free to take off<br> the seats and cover. Don't need to press the button always. <br> MORE SANITARY. If the button on the middle, men or kids urine may reach it and get dirty. So we <br>design the quick-release button beside, it offers improved life as you only need to make <br>minimal contact with the seat when you remove it for cleaning.<br> 3.The Quick Release Function is much better than the traditional mounting base: Simply press <br>the button to remove the toilet seat, you can fully clean around the seat hinges and the <br>nasty area between the seat mounting posts. And in the case of two-piece toilets you can <br>easily get around the area where the tank meets the bowl.<br><br> <b>Feature: </b><br> 1.Easy installation<br> 2.Quick Release for easy cleaning<br> 3.Quiet-Close & Soft Closed<br> 4.Not Slip and Slide for Advantage Design of One Piece Hinge Base<br> 5.Top Quality Made, Solid Toilet Seats can support more than 400 Pound<br> 6.Comes complete with all the necessary parts, instructions<br> <br>