Steel frame bed base All Next Extra Next ● ● ● Optima ● ● ● ● Swing Link ● ● ● ● Product features NEXT Steel mattress support frame with 18 fixed slats, 53 mm. OPTIMA Steel mattress support frame with 14 fixed slats, 68 mm. SWING Bed base with steel frame H approx. 80 mm, 14 fixed slats approx. 68 mm with elastic straps. LINK Steel mattress support frame with 14 fixed slats, 68 mm (kit). Steel frame bed base Next - Optima - Swing - Link