Powder Coated Yellow (Schedule 40 steel) Welded steel dome top. - 4" diameter x 36" or 4" x 42" on 8" x 8" base plate. - 6" diameter x 42" on 10" x 12" base plate. - 1/2" thick square base plate - four pre-drilled 3/4" corner holes. Stainless Steel (#304) - 4" diameter x 36" on 8" diameter base. - 6.6" diameter x 36" on 11.5" diameter base. - 1/2" thick round base plate - four pre-drilled 3/4" holes. FOB Shipping Point.