Designed to fit standard D/U-shaped toilets, this seat coordinates with multiple bolt patterns through an adjustable length range of 16.2 to 18.5 in. and a mounting hole spread of 105 to 225 millimeters. The lid measures 18.5 in. in length and 14.2 in. in width, and it ships with an extra set of expansion bolts to accommodate more toilet pans. For safety and ease of maintenance, the seat features a top-mount installation that saves you from reaching under the bowl, along with a one-button quick-release mechanism for simple cleaning. The design includes an integrated soft-close function that lowers quietly, reducing noise at night. Constructed from heavy-duty polypropylene, the seat resists staining, fading, chipping, and scratching for lasting use. Inside the lid, 4 non-slip buffers help keep the seat stable once properly fitted, while the ergonomic shape provides a comfortable sitting experience. Before ordering, check your toilet's shape and dimensions against the provided references, including the inside opening size, the front and back height, and the overall adjustment range. If the parts do not fit, reach out for a solution rather than forcing a mismatch. Please review the images for reference and measure hole locations on your toilet before purchase. Color: White.