F201181  Straight, 1.0mm tips, 18cm straight
F201211  Straight, 1.0mm tips, 21cm straight
F201231  Straight, 1.0mm tips, 23cm straight
F201251  Straight, 1.0mm tips, 25cm straight

F203181  Straight, 2.0mm tips, 18cm straight
F203211  Straight, 2.0mm tips, 21cm straight
F203231  Straight, 2.0mm tips, 23cm straight
F203251  Straight, 2.0mm tips, 25cm straight