The Sure & Secure Double Bedrail is an essential item for transitioning your child from a crib to a bed. Unique design allows for quick, easy installation. Accommodates twin to queen sized mattresses and platform beds One side folds down for easy access to the bed, allowing parents to sit bedside or change linens Meets current ASTM F2085 bedrail standards Each panel measures 42"L x 19"H Minimal assembly required Summer Infant, an award winning industry leader in developing infant and toddler products offers families safe and innovative solutions that provide peace of mind.