Select Expert frames - have 42 springy, forming a light arc, slats, made of glued laminated wood placed in elastic brackets.They have a hardness adjustment in the middle part of the frame and elastic shoulder part.Height of the frame 9-10cm.Available widths 80, 90. The Expert frame has a manual adjustment of the bolster and footrest. For a 160x200 bed you need to buy 2 pieces of 80x200 frame, while for a 180x200 bed you need to buy 2 pieces of 90x200 frame. They can be used for mattresses without springs, such as latex and foam mattresses.