Our internal doors are also all responsibly sourced, so you'll be able to be ok with your purchase. Our range of Interior Door Lining & Frames contains softwood door casing and door lining merchandise for different door types.The core may be stable wooden or other material, which affects the value and functionality of the door. When it comes to panel doors, ETO Doors boast of a spread of panel doors with two panel, three panels, and as much as 6 panels. These doors come in a wide range of wooden types, offering a sense of heat with a more conventional style. Our Fibreglass doors function extra glorious detailing for a extra natural wooden look.