Miller Full Body Splint With V-Head Rest and Standard Head Harness. LSP Miller Full Body Splint The Miller Board is a versatile spinal immobilization board and litter that comes complete with a full head and body harness. The harness system allows the patient to be rotated for airway management or to facilitate a difficult rescue without jeopardizing spinal alignment. The Miller board is constructed of high visibility yellow resin and has an x-ray translucent foam core. Load Capacity: 350 lbs. Weight: 15 lbs. Measures: 65.75"L x 14"W x 3.25"D