Seamless copper tube manufactured to the astm b 75 - standard specification for seamless copper tube may be either round, square, or rectangular and is suitable for general engineering applications. It may be manufactured from any one of the following alloys: c10100, c10200, c10300, c10800, c12000, or c12200 unless specified otherwise on the original contract or purchase order. Tubes meeting this standard may be furnished in any of several tempers (h55, h58, h80, o60, or o50) ranging from light drawn (usually limited to round tubes) to light annealed. It is the responsibility of the purchaser, when ordering, to provide the requirements for alloy (uns#), temper, dimensions (diameter, wall thickness, or distance between parallel surfaces), form (straight lengths or coils), and total length or number of pieces of any particular size. It is this requirement that forces this tube to be a special order tube and not a standard stocked material. It is usually limited to use in specific manufacturing processes or production line type applications. Plastic bag or wooden case