SuperPrime is heavy heartwood both faces with minimal defect
FAS meets the traditional National Hardwood Lumber Association grade specification. There is no sap vs heartwood limitation.
1com has a pith (heart center) limitation. There is no sap vs heartwood limitation.
2com has unlimited allowable defect perfect for Rustic application.
Width...this is a "full to width" product: example 5.0" to 5.9"
Lenght...random sawmill length, 6-12' (heavy 6-9')