Chelsea Home Furniture 361548-R-S Twin Over Twin Bunk Bed with Reversible Staircase and Underbed Storage, 60" H, Honey The rails will connect to the bed ends by a 3.5 inch lag bolt for strength Solid plantation-grown pine Actual product weights may vary based on the thickness of wood used. With any wood products, expect some deformities and knots that come natural. Constructed of solid pine for strength and durability