Structure: 40x30mm tubular recycled steel frame for a stable and powerful bed base. Legs: Strong tubular steel welded to the main frame - up to 8 legs depending on bed size. Size: Choose from 12 bed sizes to perfectly suit your needs. Advanced: Two central 40x30mm steel reinforcement bars for superior weight resistance. Basic Carbon: Get a 31cm high Basic Carbon bed base. Material: 120mm vaporised natural beech wood sheets, plywood and an elegant carbon design.