Hospitality Bed Sleeper Sofa Mechanism with 4" Full Innerspring Mattress Package includes 4" Innerspring Mattress at no additional cost Please contact us at 1 800 823 4233 with your make and model information to ensure proper fit and avoid return shipping fees Replacement mechanism is designed to easily replaces 60" full size sleeper sofas All-around tubular frame for sturdy construction and support Package will ship curbside freight, ready to install