The brilliant piano finish of this toilet seat brings out the beauty of the light oak wood, while decorative hinges add style. Signature Hardware 903919-E Features: Made of solid oak Made of American-grown red oak wood Bolt center-to-center: 5-1/2" Protective bumpers Total thickness including seat, lid, and bumpers: 2-1/4" Covered under Signature Hardware's 5 year limited warranty Signature Hardware 903919-E Specifications: Height: 2-1/4"(rim of toilet fixture to the highest point on the seat) Width: 14-1/2" (left most point to the right most point on the seat) Depth: 18-3/8" (back of the hinges to the front most part of the seat) Inside Length: 11-5/8" (back to the front of the inner opening of the seat) Inside Width: 8-5/8" (back to the front of the inner opening of the seat) Distance Required Between Installation Holes: 5-1/2" Elongated Seat Dimensions:14-1/2" L x 17-1/4" W (front to back)