Bullion Knot Needles from Hiroshima Tulip. Package contains a corked tube of four (4) needles: two each 60 mm long and two 65 mm long. The exceptionally smooth fininsh on these needles makes them perfect for Bullion, Cast-on and Double Knots. The needle is like a milliners needle with a straight shaft with the eye of the needle the same size as the shaft. Tulip needles are strong and the special polishing process makes the eyes easy to thread and the needle itself rust proof and durable.