421320  Brick, Stone, and Related Construction Material Wholesalers

This U.S. industry comprises establishments primarily engaged in 
wholesaling stone, cement, lime, construction sand, and gravel; 
brick; asphalt and concrete mixtures; and/or concrete, stone, and 
structural clay products

The data published with NAICS code 421320 include the following 
SIC industry:

     5032 (pt)  Brick, stone and related construction materials