Select options Fixed Slat Bases $225.00 – $450.00 Now in new modern Lorenzia linen fabric cover goes with all décor. Ideal for triple sheeting. No need for valance or bedspread. Choice of 50, 100 or 150mm castors or Glides. 9 each for Queen and Double. Queen has 13 Slats and 22 suppport blocks. Strong, durable and good support for the mattress. You will NEVER have a structural problem with this base. It also allows plenty of ventilation unlike many companies bases with fewer slats and a solid sheet on top.