Product Description: 【Versatile Compatibility D-Shaped Toilet Seat 】 -Designed to fit standard D/U-shaped toilets with an extra set of expansion bolts to accommodate more toilet pans ,the toilet cover is 18 " Length, 14.2 " width (455 L x 361 W mm), adjustable length 16.2"-18.5" (412-472mm) ,which fits holes between 105-225 mm), please confirm toilet seat specifications before ordering (see image for reference). 【Quick Release & Easy Install Toilet Seat】Even newbies can install it with ease, and the top-mounted installation saves you from reaching under the pot. The one-button quick release makes cleaning and maintenance hassle-free. 【No Slamming】 Silent Operation - No more worries about noisy slams with the automatic lowering mechanism integrated within the seat and lid, ensuring quiet and seamless operation, even at night. 【Soft Close Toilet Seat】 The D shape toilet seat is smooth, comfortable, and ensures a better sitting experience. It features a super soft and noiseless closing mechanism that leaves no regrets of waking other family members at night. 【High Quality Material】 Made from heavy duty PP, the toilet seat is high quality, so it's durable which could resistant to staining, fading, chipping and scratching