Color classification
Y245B56 ring-low bed box bed (with bottom plate)
Y245B56 ring-low box bed (no bottom plate)
Suspension box bed (with bottom plate) Y83B71
Suspension box bed (no bottom plate) Y83B71
Suspension box bed (no bottom plate) Y83B48
Suspension box bed (with bottom plate) Y83B48
Suspension box bed (no bottom plate) + mattress (thick 8.66inJ56 hard H2)Y83B48
Suspension box bed (with bottom plate) + mattress (8.66in thick J56 hard H2)Y83B48
The size option is the inner diameter, and the actual occupied space is calculated as the outer diameter.