Centoco 620-106-A Elongated Premium Plastic Toilet Seat w/Open front, BoneBone Premium Plastic Toilet Seat open front with cover, heavy duty, top mount plastic hinge for elongated bowls.Centoco 620-106-A Elongated Premium Plastic Toilet Seat w/Open front, Bone Features: Extended back Integrally-molded, permanent and sanitarycolor-keyed bumpers Corrosion-free hardware Withstands cleansers, strong chemicals