Round Toilet Seat, Slow Soft Quiet Close, Thicken Engineering Plastic, No Wiggle Never Loosen,Easy To Install And Clean, Fits All America Standard Toilets (Biscuit/Linen,16.5”ROUND) - Amazon.com
Toilet Seat Round with Non-Slip Seat Bumpers, Universal Quiet-Close Toilet Lid, Never Loosen and Easy to Install, Durable Plastic, White, Fits Standar - Amazon.com
American Standard MightyTuff Plastic White Round Soft Close Toilet Seat in the Toilet Seats department at Lowes.com