The Twin Trundle bed by KD Frames now has more slats! The slat spacing is now 2.8 inches to accommodate most mattresses on the market today. The Twin Trundle is a perfect solution for extra bed space without taking up extra room. Equipped with four sturdy wheel for easy gliding and a weight limit of 400 pounds, this bed is designed to fit under all sizes - EXCEPT FOR THE KING NOMAD WHICH COMES WITH CENTER LEGS - of the Nomad, Charleston, and Lexington platform beds. Like all of our products the Trundle bed is eco-friendly and chemical-free with clean lines and subtle design. PDF of assembly instructions can be found here.