Stk refers to grade of cedar being a select tight knot. 36″ is square end. 42″ is angled one end at 45 degrees.
Base Width: Width dependent upon supplying vendor.
Available Lengths: 36″, 42″ A1E
Actual length may be 1/4″ shorter than what is listed above. Cedar and Hemlock are both a clear, kiln dried product.