Wood Wool - Grades and Classifications

Grades and Classifications

The 1973 U.S. federal procurement specification PPP-E-911, cancelled in 1991, categorized "wood excelsior" products according to the following table of terms and dimensions:

TABLE I. Strand size for type I class A and B excelsior ------------------------------------------------------------------------------- Thickness of strand Width of strand Grade Nomenclature Inch Inch ------------------------------------------------------------------------------- 1 Superfine wood wool 0.006 0.020 2 Wood wool 0.012 0.020 3 Extra fine 0.015 0.031 4 Fine 0.018 0.031 5 Medium 0.021 0.041 6 Coarse or ribbon 0.015 0.167 -------------------------------------------------------------------------------