The Doors Marked B- are from our High Quality Custom Cabinet Line. They are all Wood with no Particle Board. They have all Blum Soft Close Hinges & Drawer Extensions. They are Made in the USA. They are availible in Maple, Oak, Cherry, Alder, Hickory, and Walnut Woods. They can be Stained to Match most any Color Woodwork in your Home. For more Info. Call us at 262-437-7336 For a Free Estimate.