Serta 3-in-1 Twin/King Combo Air Mattress with External Pump Multiple configuration air bed offers a Raised Twin, Standard King, Two Standard Twins Each twin bed has 28 circular coils to create a comfortable and supportive sleeping surface Raised height makes getting in and out of bed easier Powerful external AC Pump for effortless inflation & deflation Durable flocked top provides a soft and comfortable sleep surface that also keeps your sheets in place Carry Bag Included Inflated Dimensions: 74" x 39" x 9" (x2) Please inflate your mattress according to the included instructions. Note that the material may stretch during the first several uses. It is recommended to inflate your bed at least 1 hour prior to using or measuring it. Extra air may be required after this period to achieve full firmness. All mattress measurements should be taken from the center of the bed surface.For width and length, measure across the bed from the center of each side from widest point to widest point.For the height, measure at the center of the longest side from the ground to the highest point of the bed surface. Questions? Please email our Customer Service Team at Contactus@Wenzelco.com or by phone Monday-Friday 9 AM - 5 PM CST at 1-800-325-4121