A heavy open grain hardwood with larger more prominent pores. Red Oak is very hard, stiff, and durable with great wear resistance. The heartwood varies from a pink brown to a reddish brown while the sapwood is a whitish or grayish brown and the natural color and grain variations are allowed. Mineral stain allowed no larger than 1/8" wide by 6" long. Pin burls and small pin knots (no holes) and limited (less than 15%) sapwood allowed. Small filled knots allowed on the backs of doors as long as they do not show through to the front of the door. Mineral may appear in machined areas.