Lifetime Warranty Spring Seat Construction Solid Maple Replaceable Components Nemschoff Mortise and Tenon (M) Model Only Needs to Be 4" From the Wall (H) Model Only Needs to Be 61/2 From the Wall Low Formaldehyde Emissions Nemschoff Healthcare finishes for heavy use and harsh cleaning Certified to meet CTB 133/ASTM E-1537 Three Positions: Upright and Two Recline