This replacement Leggett & Platt mattress retainer bar is what you need to hold a mattress to your Legget & Platt sofa sleeper bed deck. Made of solid iron, this retainer is meant to be inserted into the bed deck's frame to ensure mattress does not slide off or fall out during use. This is the residential version that works with Leggett & Platt's 2500 Max Plus sofa sleeper. This is a fitting replacement if the retainer bar in your Leggett & Platt sofa sleeper bed deck has become broken or missing. Contact customer service if you have any questions about compatibility, similar products, or bulk pricing.