17 Plastics for use in manufacture; plastics in semi-finished form for use in manufacture; plastics in the form of rods (term considered too vague by the International Bureau - Rule 13 (2) (b) of the Regulations); discs, blocks, tubes, films sheets and foil, all for use in manufacture (term considered too vague by the International Bureau - Rule 13 (2) (b) of the Regulations); any one of the aforementioned for use in medical device manufacture