This toilet seat fits most O-shape toilets and includes extra expansion bolts for holes 12–17 mm (please check size before purchase). The top-fix design allows for easy installation, and the one-button quick-release makes cleaning effortless. Featuring a built-in soft-close mechanism, the seat and lid close quietly without slamming. Four non-slip buffers keep it secure and stable, while the heavy-duty urea-formaldehyde material (ISO 22196 certified) is antibacterial and resistant to stains, fading, chips, and scratches for long-lasting durability.