1.Lowes,Home Depot doors 2.Embroidered glass inserts 3.No bending and crack 4.Soundproof,sun resistant 5.GQT,3A certificate 1. Door can be made into usage for interior or for exterior: a)Engineered solid wooden door for interior, will not bend or crack but can not be soaked in water.Door structure: fir wood core, natural hardwood surrounded in the lipping, tongue and groove glued together under ...