This is it! The pop up trundle you've been looking for and RC Willey has it. This trundle is perfect for sliding under a bed for extra sleeping accommodations. It's waiting and ready when you need it - just pull it out and pop it up! Simply pull up on the long handle to move it into the desired position - whether pulling it up or pushing it down. The trundle measures 5 when down and 16 when popped up. Keep in mind the height of your mattress when you're trying to figure out if it will slide underneath your bed frame.