Shall consist of miscellaneous, unalloyed copper scrap having nominal 96% copper content (minimum 94%) as determined by electrolytic assay. Should be free of the following: Excessively leaded, tinned, soldered copper scrap; brasses and bronzes; excessive oil content, iron and non-metallics; copper tubing with other than copper connections or with sediment; copper wire from burning, containing insulation; hair wire, burnt wire which is brittle; and should be reasonably free of ash. Hydraulically briquetted copper subject to agreement.