Manual spring positioning and bed height adjustments. Permanently attached pull tube cranks control operation of head and foot spring assemblies. Cranks fold away for storage. Hi/lo crank is permanently attached at foot of bed for height adjustment; crank folds away for storage. Trendelenburg (shock) position can be achieved quickly. Head-end height 37 1/4”, foot-end height 24 7/8”. Overall length 88”, bed width 36”. 80” spring. Mattress not included.