The invention relates to a method of manufacturing tubes comprising steps of: - enclosing a parison (14) in a mold (6) to form a blank (15) having a first end portion having the shape of a first head tube, a tubular central portion, and a second end portion having the shape of a second tube head, and - cutting the tubular central portion (22) into a first skirt and a second skirt to obtain two separate tubes, including a first tube including the first tube head and the first skirt, and a second tube including the second tube head and the second skirt.
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