steves sons 24 in x 80 in 2 panel arch solid core oak interior door slab unfinished 6 panel solid core unfinished oak wood interior door custom single solid liberty doors internal oak unfinished natural unfinished slab door custom raised panel white oak doors unfinished pine wood slab door oak internal doors jb kind western 8 panel wood door trustile wood door construction wood fibergl doors interior doors solid wood with walnut finish interior doors internal sliding doors