What are the specifications of the mattress?

Single - 5.5 coil，406 units

Long Single - 5.5 coil，420 units

Twin - 5.5 coil，551 units

Long Twin - 5.5 coil，570 units

Double - 5.5 coil, 638 units

Long Double - 5.5 coil，660 units

Queen - 5.5 coil，720 units

Long Queen - 5.5 coil, 768 units

King - 5.5 coil，896 units